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知米背單詞..語,但單詞知米妞：為了方便各位寶寶做筆記，因此行間距已經(jīng)調(diào)整為1.5,因此不會(huì)的單詞，大家可以查詢之后在上面做筆記啦！妞妞已經(jīng)為大家查錯(cuò)了兩遍（雖然不能保證100%），但也差不多沒啥問題了！如需打印，直接拿pdf去打印即可，可以避免因?yàn)榘姹静患嫒莸惹闆r出現(xiàn)的問題哦~TypicalofthegrasslanddwellersofthecontinentistheAmericanantelope,orpronghorn.美洲羚羊，或稱叉角羚，是該大陸典型的草原動(dòng)物。OfthemillionswhosawHaley’scometin1986,howmanypeoplewilllivelongenoughtoseeitreturninthetwenty-firstcentury.1986年看見哈雷彗星的幾百萬人當(dāng)中，有多少人能夠長(zhǎng)壽到足以目睹它在二十一世紀(jì)的回歸呢？Anthropologistshavediscoveredthatfear,happiness,sadness,andsurpriseareuniversallyreflectedinfacialexpressions.人類學(xué)家們已經(jīng)發(fā)現(xiàn)，恐懼，快樂，悲傷和驚奇都會(huì)行之于色，這在全人類是共通的。Becauseofitsirritatingeffectonhumans,theuseofphenolasageneralantiseptichasbeenlargelydiscontinued.由于苯酚對(duì)人體帶有刺激性作用，它基本上已不再被當(dāng)作常用的防腐劑了。Ingrouptoremaininexistence,aprofit-makingorganizationmust,inthelongrun,producesomethingconsumersconsiderusefulordesirable.任何盈利組織若要生存，最終都必須生產(chǎn)出消費(fèi)者可用或需要的產(chǎn)品。Thegreaterthepopulationthereisinalocality,thegreatertheneedthereisforwater,transportation,anddisposalofrefuse.一個(gè)地方的人口越多，其對(duì)水，交通和垃圾處理的需求就會(huì)越大。Itismoredifficulttowritesimply,directly,andeffectivelythantoemployflowerybutvagueexpressionsthatonlyobscureone’smeaning.對(duì)于采用語言花哨而含糊，僅僅能含糊地說出意思的表達(dá)來說，寫的簡(jiǎn)單，直接而又有感染力要更難一些。知米背單詞..語,但單詞Withmodernofficesbecomingmoremechanized,designersareattemptingtopersonalizethemwithwarmer,lesssevereinteriors.隨著現(xiàn)代辦公室的日益自動(dòng)化，設(shè)計(jì)師們正試圖利用較為溫暖而不太嚴(yán)肅的內(nèi)部裝飾來使其具有親切感。Thedifferencebetweenlibelandslanderisthatlibelisprintedwhileslanderisspoken.誹謗和流言的區(qū)別在于前者是書面的，而后者是口頭的。Thekneeisthejointswherethethighbonemeetsthelargeboneofthelowerleg.膝蓋是大腿骨和小腿脛的連接處。Acidsarechemicalcompoundsthat,inwatersolution,haveasharptaste,acorrosiveactiononmetals,andtheabilitytoturncertainbluevegetabledyesred..酸是一種化合物，它在溶于水時(shí)具有強(qiáng)烈的氣味和對(duì)金屬的腐蝕性，并且能夠使某些藍(lán)色植物染料變紅。BillieHoliday’sreputationasagreatjazz-bluessingerrestsonherabilitytogiveemotionaldepthtohersongs.BillieHoliday's作為一個(gè)爵士布魯斯樂杰出歌手的名聲建立在能夠賦予歌曲感情深度的能力。Essentially,atheoryisanabstract,symbolicrepresentationofwhatisconceivedtobereality.理論在本質(zhì)上是對(duì)已認(rèn)識(shí)到的現(xiàn)實(shí)的一種抽象和符號(hào)化的表達(dá)。Longbeforechildrenareabletospeakorunderstandalanguage,theycommunicatethroughfacialexpressionsandbymakingnoises.兒童在能說或能聽懂語言之前，很久就會(huì)通過面部表情和靠發(fā)出噪聲來與人交流了。Thankstomodernirrigation,cropsnowgrowabundantlyinareaswhereoncenothingbutcactiandsagebrushcouldlive.受當(dāng)代灌溉技術(shù)的影響，農(nóng)作物能夠在原本只有仙人掌和養(yǎng)屬科植物才能生存的地方旺盛生長(zhǎng)。知米背單詞..語,但單詞Thedevelopmentofmechanicaltimepiecesspurredthesearchformoreaccuratesundialswithwhichtoregulatethem.機(jī)械計(jì)時(shí)器的發(fā)展促使人們尋求更精確的日晷，以便校準(zhǔn)機(jī)械計(jì)時(shí)器。Anthropologyisascienceinthatanthropologistsusearigoroussetofmethodsandtechniquestodocumentobservationsthatcanbecheckedbyothers.人類學(xué)是一門科學(xué)，因?yàn)槿祟悓W(xué)家采用一整套強(qiáng)有力的方法和技術(shù)來記錄觀測(cè)結(jié)果，而這樣記錄下來的觀測(cè)結(jié)果是供他人核查的。Fungiareimportantintheprocessofdecay,whichreturnsingredientstothesoil,enhancessoilfertility,anddecomposesanimaldebris.真菌在腐化過程中十分重要，而腐化過程將化學(xué)物質(zhì)回饋于土壤，提高其肥力，并分解動(dòng)物糞便。Whenitisstruck,atuningforkproducesanalmostpuretone,retainingitspitchoveralongperiodoftime.音叉被敲擊時(shí)，產(chǎn)生幾乎純質(zhì)的音調(diào)，其音量經(jīng)久不衰。AlthoughpecansaremostplentifulinthesoutheasternpartoftheUnitedStates,theyarefoundasfarnorthasOhioandIllinois.雖然美洲山河桃樹最集中于美國(guó)的東南部但是在北至俄亥俄州及伊利諾州也能看見它們。Eliminatingproblemsbytransferringtheblametoothersisoftencalledscape-goating.用怪罪別人的辦法來解決問題通常被稱為尋找替罪羊。Thechieffoodseateninanycountrydependlargelyonwhatgrowsbestinitsclimateandsoil.一個(gè)國(guó)家的主要食物是什么，大體取決于什么作物在其天氣和土壤條件下生長(zhǎng)得最好。Overaverylargenumberoftrials,theprobabilityofanevequaltodtheipmoibaEbiitythatitwillnotoccur.在大量的實(shí)驗(yàn)中，某一事件發(fā)生的幾率等于它不發(fā)生的幾率。知米背單詞..語,但單詞Mostsubstancecontractwhentheyfreezesothatthedensityofasubstance,ssolidishdensityofitsliquid.大多數(shù)物質(zhì)遇冷收縮，所以他們的密度在固態(tài)時(shí)高于液態(tài)。Themechanismbywhichbraincellsstorememoriesisnotclearlyunderstood.大腦細(xì)胞儲(chǔ)存記憶的機(jī)理并不為人明白。Bythemiddleofthetwentiethcentury,paintersandsculptorsintheUnitedStateshadbeguntoexertagreatworldwideinfluenceoverart.到了二十一世紀(jì)中葉，美國(guó)畫家和雕塑家開始在世界范圍內(nèi)對(duì)藝術(shù)產(chǎn)生重大影響。IntheeasternpartofNewJerseyliesthecityofElizabeth,amajorshippingandmanufacturingcenter.伊麗莎白市，一個(gè)重要的航運(yùn)和制造業(yè)中心，坐落于新澤西州的東部。ElizabethBlackwell,thefirstwomanmedicaldoctorintheUnitedStates,foundedtheNewYorkInfirmary,aninstitutionthathasalwayshadacompletelyfemalemedicalstaff.ElizabethBlackwell，美國(guó)第一個(gè)女醫(yī)生，在紐約創(chuàng)建了一所員工皆為女性的診所。AlexanderGrahamBelloncetoldhisfamilythathewouldratherberememberedasateacherofthedeafthanastheinventorofthetelephone.AlexanderGrahamBell曾告訴家人，他更愿意讓后人記住他是聾子的老師，而非電話的發(fā)明者。Becauseitsleavesremaingreenlongafterbeingpicked,rosemarybecameassociatedwiththeideaofremembrance.采摘下的迷迭香樹葉常綠不衰，因此人們把迷迭香樹與懷念聯(lián)系在一起。Althoughapparentlyrigid,bonesexhibitadegreeofelasticitythatenablestheskeletontowithstandconsiderableimpact.骨頭看起來是脆硬的，但它也有一定的彈性，使得骨骼能夠承受相當(dāng)?shù)拇驌?。知米背單詞知米背單詞學(xué)遍語，與單詞Thatxenoncouldnotformchemicalcompoundswasoncebelievedbyscientists.科學(xué)家曾相信：氙氣是不能形成化合物的。Researchintothedynamicsofstormsisdirectedtowardimprovingtheabilitytopredicttheseeventsandthustominimizedamageandavoidlossoflife.對(duì)風(fēng)暴動(dòng)力學(xué)的研究是為了提高風(fēng)暴預(yù)測(cè)從而減少損失，避免人員傷亡。Theeliminationofinflationwouldensurethattheamountofmoneyusedinrepayingaloanwouldhavethesamevalueastheamountofmoneyborrowed.消除通貨膨脹應(yīng)確保還貸的錢應(yīng)與所貸款的價(jià)值相同。Futurism,anearlytwentieth-centurymovementinart,rejectedalltraditionsandattemptedtoglorifycontemporarylifebyemphasizingthemachineandmotion.未來主義，二十世紀(jì)早期的一個(gè)藝術(shù)思潮。拒絕一切傳統(tǒng)，試圖通過強(qiáng)調(diào)機(jī)械和動(dòng)態(tài)來美化生活。OneofthewildestandmostinaccessiblepartsoftheUnitedStatesistheEvergladeswherewildlifeisabundantandlargelyprotected.Everglades是美國(guó)境內(nèi)最為荒涼和人跡罕至的地區(qū)之一，此處有大量的野生動(dòng)植物，而且大多受（法律）保護(hù)。LucretiaMott’sinfluencewassosignificantthatshehasbeencreditedbysomeauthoritiesastheoriginatoroffeminismintheUnitedStates.LucretiaMott的影響巨大，所以一些權(quán)威部門認(rèn)定她為美國(guó)女權(quán)運(yùn)動(dòng)的創(chuàng)始人。Theactivitiesoftheinternationalmarketingresearcherarefrequentlymuchbroaderthanthoseofthedomesticmarketer.國(guó)際市場(chǎng)研究者的活動(dòng)范圍常常較國(guó)內(nèi)市場(chǎng)研究者廣闊。ThecontinentaldividereferstoanimaginarylineintheNorthAmericanRockiesthatdividesthewatersflowingintotheAtlanticOceanfromthoseflowingintothePacific.大陸分水嶺是指北美洛磯山脈上的一道想象線，該線把大西洋流域和太平洋流域區(qū)分開來。知米背單詞..語,但單詞StudiesofthegravityfieldoftheEarthindicatethatitscrustandmantleyieldwhenunusualweightisplacedonthem.對(duì)地球引力的研究表明，在不尋常的負(fù)荷之下地殼和地幔會(huì)發(fā)生位移。TheannualworthofUtah’smanufacturingisgreaterthanthatofitsminingandfarmingcombined.猶他州制造業(yè)的年產(chǎn)值大于其工業(yè)和農(nóng)業(yè)的總和。Thewallflowerissocalledbecauseitsweakstemsoftengrowonwallsandalongstonycliffsforsupport.墻花之所以叫墻花，是因?yàn)槠浯嗳醯闹Ω山?jīng)常要靠墻壁或順石崖生長(zhǎng)，以便有所依附。Itistheinteractionbetweenpeople,ratherthantheeventsthatoccurintheirlives,thatisthemainfocusofsocialpsychology.社會(huì)心理學(xué)的主要焦點(diǎn)是人與人之間的交往，而不是他們各自生活中的事件。NosocialcrusadearousedElizabethWilliams’enthusiasmmorethantheexpansionofeducationalfacilitiesforimmigrantstotheUnitedStates.給美國(guó)的新移民增加教育設(shè)施比任何社會(huì)運(yùn)動(dòng)都更多的激發(fā)了ElizabethWilliams的熱情。Quailstypicallyhaveshortroundedwingsthatenablethemtospringintofullflightinstantlywhendisturbedintheirhidingplaces.典型的鵪鶉都長(zhǎng)有短而圓的翅膀，憑此他們可以在受驚時(shí)一躍而起，飛離它們的躲藏地。Accordingtoanthropologists,theearliestancestorsofhumansthatstooduprightresembledchimpanzeesfacially,withslopingforeheadsandprotrudingbrows.根據(jù)人類學(xué)家的說法，直立行走的人的鼻祖面部輪廓與黑猩猩相似，額頭后傾，眉毛突出。Notuntil1866wasthefullysuccessfultransatlanticcablefinallylaid.直到1866年第一條橫跨大西洋的電纜才完全成功的架通。知米背單詞Inhiswriting,JohnCroweRansomdescribeswhatheconsidersthespiritualbarrennessofsocietybroughtaboutbyscienceandtechnology.JohnCroweRansom在他的著作中描述了他認(rèn)為是由科學(xué)技術(shù)給社會(huì)帶來的精神貧困。Childrenwithparentswhoseguidanceisfirm,consistent,andrationalareinclinedtopossesshighlevelsofself-confidence.父母的教導(dǎo)如果堅(jiān)定，始終如一和理性，孩子就有可能充滿自信。TheancientHopewellpeopleofNorthAmericaprobablycultivatedcornandothercrops,buthuntingandgatheringwerestillofcriticalimportanceintheireconomy.北美遠(yuǎn)古的Hopewell人很可能種植了玉米和其他農(nóng)作物，但打獵和采集對(duì)他們的經(jīng)濟(jì)貿(mào)易仍是至關(guān)重要的。Usingmanysymbolsmakesitpossibletoputalargeamountofinformationonasinglemap.使用多種多樣的符號(hào)可以讓一張地圖盡可能地顯示更多信息。Anarchismisatermdescribingaclusterofdoctrinesandattitudeswhoseprincipalunitingfeatureisthebeliefthatgovernmentisbothharmfulandunnecessary.無政府主義是一個(gè)用來描述政府無用且多余的術(shù)語，表達(dá)了一種信條和態(tài)度。ProbablynomanhadmoreeffectonthedailylivesofmostpeopleintheUnitedStatesthandidHenryFordapioneerinautomobileproduction.要論影響大部分美國(guó)人日常生活的事物，恐怕沒有能超過汽車生產(chǎn)的先驅(qū)亨利?福特的。Theuseofwell-chosennonsensewordsmakesthetestingofmanybasichypothesesinthefieldoflanguagelearningpossible.利用一些特定的無意義詞匯，可以檢驗(yàn)語言學(xué)科里許多基本的假定理論。Thehistoryofpaintingisafascinatingchainofeventsthatprobablybeganwiththeveryfirstpicturesevermade.知米背單詞..語,但單詞繪畫的歷史是一連串非常吸引人的故事，這些故事很可能從第一幅畫的繪制就開始了。Perfectlymatchedpearls,strungintoanecklace,bringafarhigherpricethanthesamepearlssoldindividually.相互搭配的珍珠，串成一條項(xiàng)鏈，就能比單獨(dú)售出一顆珍珠賣出更高的價(jià)錢。Duringtheeighteenthcentury,LittleTurtlewaschiefoftheMiamitribewhoseterritorybecamewhatisnowIndianaandOhio.十八世紀(jì)時(shí)，"LittleTurtle”是邁阿密部落的酋長(zhǎng)，該部落的地理位置就是今天的印第安那州和俄亥俄州。Amongalmostsevenhundredspeciesofbamboo,somearefullygrownatlessthanafoothigh,whileotherscangrowthreefeetintwenty-fourhours.在竹子的近七百個(gè)品種中，有的全長(zhǎng)還不到一英尺，有的卻能在二十四小時(shí)內(nèi)長(zhǎng)出三英尺。Beforestartingonaseavoyage,prudentnavigatorslearntheseacharts,studythesailingdirections,andmemorizelighthouselocationstopreparethemselvesforanyconditionstheymightencounter.謹(jǐn)慎的航海員在出航前會(huì)研究航向，記錄燈塔的位置，以便應(yīng)對(duì)各種可能出現(xiàn)的狀況。Ofalltheeconomicallyimportantplants,palmshavebeentheleaststudied.在所有的經(jīng)濟(jì)作物中，對(duì)棕櫚樹的研究最少。Buyersandsellersshouldbeawareofnewdevelopmentsintechnologycananddoesaffectmarketingactivities.購(gòu)買者和銷售者都應(yīng)該關(guān)注科學(xué)技術(shù)新發(fā)展，原因很簡(jiǎn)單，因?yàn)榧夹g(shù)能夠并且已經(jīng)在影響營(yíng)銷活動(dòng)。Theapplicationofelectroniccontrolsmadepossiblebythemicroprocessorandcomputerstoragehavemultipliedtheusesofthemoderntypewriter.電腦儲(chǔ)存和因電子微處理機(jī)得以實(shí)現(xiàn)的電控運(yùn)用成倍地增加了現(xiàn)代打字機(jī)的功能。Thehumanskeletonconsistsofmorethantwohundredbonesboundtogetherbytoughandrelativelyinelasticconnectivetissuescalledligaments.知米背單詞..語,但單詞人類的骨骼由二百多塊骨頭組成，并由堅(jiān)韌而相對(duì)缺乏彈性的結(jié)締組織一一韌帶連接在一起。Thepigmentationofapearlisinfluencedbythetypeofoysterinwhichitdevelopsandbythedepth,temperature,andthesaltcontentofthewaterinwhichtheoysterlives.珍珠的色澤會(huì)受到牡蠣種類、牡蠣生活水域的深度、溫度和含鹽度的影響。Althoughmockingbirdssuperblymimicthesongsandcallsofmanybirds,theycannonethelessbequicklyidentifiedasmockingbirdsbycertainauralclues.雖然學(xué)舌鳥能惟妙惟肖的模仿歌曲和許多鳥類的叫聲，但人們還是能夠迅速通過辨析固定的聲線來辨別學(xué)舌鳥的叫聲。Notonlycanwalkingfishliveoutofwater,buttheycanalsotravelshortdistancesoverland.鲇魚不僅可以離開水存活，還可以在岸上短距離移動(dòng)。Scientistsdonotknowwhydinosaursbecameextinct,butsometheoriespostulatethatchangesingeography,climate,andsealevelswereresponsible.科學(xué)家不知道恐龍為何滅絕，但是有一些理論推斷表示，恐龍的滅絕是由地理、氣候和海平面的變化造成的。Thescienceofhorticulture,inwhichtheprimaryconcernsaremaximumyieldandsuperiorquality,utilizesinformationderivedfromothersciences.高產(chǎn)優(yōu)質(zhì)的園藝學(xué)科學(xué)采用了很多其他科學(xué)派生出的信息。Snowaidsfarmersbykeepingheatinthelowergroundlevels,therebysavingtheseedsfromfreezing.對(duì)農(nóng)民來說，雪可以保持地層土壤的溫度，讓種子不致凍死。Eventhoughtheprecisequalitiesofheroinliterarywordsmayvaryovertime,thebasicexemplaryfunctionoftheheroseemstoremainconstant.歷代文學(xué)作品中的英雄本色雖然各有千秋，但其昭世功力卻是恒古不變的。Peopleinprehistorictimescreatedpaintsbygrindingmaterialssuchasplantsandclayintopowerandthenaddingwater.知米背單詞..語,但單詞遠(yuǎn)古時(shí)代，人們通過將植物和泥土等原料磨成粉末后加水來制造顏料。Oftenveryannoyingweeds,goldenrodscrowdoutlesshardyplantsandactashoststomanyinsectpests.金菊是一種非常令人討厭的野草，它會(huì)阻礙耐寒植物的生長(zhǎng)，并且還是眾多害蟲的棲息地。Startingaround7000B.C.,andforthenextfourthousandyears,muchoftheNorthernHemisphereexperiencedtemperatureswarmerthanatpresent.大約從公元前7000年開始后的四千年當(dāng)中，北半球的溫度都要比現(xiàn)在高。WhenHenryFordfirstsoughtfinancialbackingformakingcars,theverynotionoffarmersandclerksowningautomobileswasconsideredridiculous.當(dāng)亨利?福特最初為制造汽車尋求資金支持時(shí)，他的“農(nóng)民和一般職員也能擁有汽車”這一想法被認(rèn)為是可笑的。Thoughoncequitelarge,thepopulationofthebaldeagleacrossNorthAmericahasdrasticallydeclinedinthepastfortyyears.曾經(jīng)北美禿頭鷹的數(shù)量很多，但在近四十年的時(shí)間里，全北美的禿頭鷹數(shù)量急劇下降。Thebeaverchewsdowntreestogetfoodandmaterialwithwhichtobuilditshome.海貍啃倒樹木，以便得到食物和造窩的材料。Poodleswereonceusedasretrieversinduckhunting,buttheAmericanKennelClubdoesnotconsiderthemsportingdogsbecausetheyarenowprimarilykeptaspets.貴賓犬曾被用作獵鴨時(shí)叼回獵物的獵犬，現(xiàn)今大多數(shù)被家庭作為寵物飼養(yǎng)，所以美國(guó)KennelClub不再將貴賓認(rèn)定為獵犬。Asaresultofwhatisnowknowninphysicsandchemistry,scientistshavebeenabletomakeimportantdiscoveriesinbiologyandmedicine.在已有物理化學(xué)知識(shí)基礎(chǔ)上，科學(xué)家們可以在生物學(xué)和醫(yī)學(xué)上獲得許多重大發(fā)現(xiàn)。Thepracticeofmakingexcellentfilmsbasedonratherobscurenovelshasbeengoingonsolonginthe10知米背單詞..語,但單詞UnitedStatesastoconstituteatradition.根據(jù)默默無聞的小說制作優(yōu)秀影片這一現(xiàn)象在美國(guó)由來已久，已經(jīng)成為傳統(tǒng)。Sincetheconsumerconsidersthebestfruittobethatwhichisthemostattractive,thegrowermustprovideproductsthatsatisfythediscerningeye.由于大多顧客認(rèn)為好的水果看起來也應(yīng)該是最漂亮的，所以種植者必須提供能讓顧客賞心悅目的農(nóng)產(chǎn)品。Television themostpervasiveandpersuasiveofmoderntechnologies,markedbyrapidchangeandgrowth,ismovingintoanewera,aneraofextraordinarysophisticationandversatility,whichpromisestoreshapeourlivesandourworld.電視，這項(xiàng)最普及和最有影響力的現(xiàn)代技術(shù)，正步入一個(gè)極為成熟和多樣化的新時(shí)代，并將重塑我們的生活和世界。Televisionismorethanjustanelectronics;itisameansofexpression,aswellasavehicleforcommunication,andassuchbecomesapowerfultoolforreachingotherhumanbeings.電視不僅僅是一種電器，還是一種表達(dá)和交流的手段，是人與人之間互動(dòng)的有效工具。Evenmoreshockingisthefactthatthenumberandrateofimprisonmenthavemorethandoubledoverthepasttwentyyears,andrecidivism thatistherateforre-arrest ismorethan60percent.更讓人吃驚的是，監(jiān)禁犯人的數(shù)目和比例在過去的二十年中翻了一番有余，累犯率一一即再次拘押的比例一一為百分之六十。WilliamRaineyHarperluredhimtothenewuniversityofChicago,whereheremainedofficiallyforexactlyagenerationandwherehisstudentsinadvancedcompositionfoundhimterrifyinglyfrigidintheclassroombutsympatheticandunderstandingintheirpersonalconferences.他的教書生涯始于麻省理工學(xué)院，但是WilliamRaineyHarper把他吸引到了新成立的芝加哥大學(xué)。他在那里正式任職，就職長(zhǎng)達(dá)整整一代人的時(shí)間。他高級(jí)作文課上的學(xué)生覺得他在課上古板得可怕，但私下交流卻很善解人意。11知米背單詞學(xué)遍語，與單詞Theslothpayssuchlittleattentiontoitspersonalhygienethatgreenalgaegrowonitscoarsehairandcommunitiesofaparasiticmothliveinthedepthsofitscoatproducingcaterpillarswhichgrazeonitsmouldyhair.Itsmusclesaresuchthatitisquitsincapableofmovingataspeedofoverakilometeranhourevenovertheshortestdistancesandtheswiftestmovementitcanmakeisasweepofitshookedarm.樹獺很不講究衛(wèi)生，以至于它粗糙的毛發(fā)會(huì)生出綠苔，成群的寄生蛾生長(zhǎng)在它的皮毛深處變成毛毛蟲，并以它的臟毛為食。樹獺的肌肉不能讓其哪怕是在很短距離內(nèi)以每小時(shí)一公里的速度移動(dòng)。它能做的最敏捷的動(dòng)作就是揮一揮彎曲的胳膊。Artificialflowersareusedforscientificaswellasfordecorativepurposes.Theyaremadefromavarietyofmaterials,suchaswaxandglass,soskillfullythattheycanscarcelybedistinguishedfromnaturalflowers.人造花卉既可用于科學(xué)研究，也可用于裝飾?；ɑ芸梢杂酶鞣N各樣的材料制成，比如蠟和玻璃。并且制作非常精巧，幾乎可以以假亂真。ThreeyearsofresearchatanabandonedcoalmineinArgonne,Illinois,haveresultedinfindingsthatscientistsbelievecanhelpreclaimthousandsofminedisposalsitesthatscarthecoal-richregionsoftheUnitedStates.在伊利諾伊州Argonne市的一個(gè)廢棄煤礦長(zhǎng)達(dá)3年的研究終于取得了成果，科學(xué)家們相信這些成果可以幫助改造那些把美國(guó)產(chǎn)煤區(qū)弄得傷痕累累的數(shù)千個(gè)舊煤場(chǎng)。Whenthepersuadingandtheplanningforthewesternrailroadshadfinallybeencompleted,thereallychallengingtaskremained:thedangerous,sweaty,backbreaking,brawlingbusinessofactuallybuildingthelines.有關(guān)西部鐵路的說服和規(guī)劃工作終于完成后，真正艱難的任務(wù)，即鐵路的建造工作還未開始。這些工作實(shí)施起來很危險(xiǎn)吃力，需要傷筋動(dòng)骨。Becauseofthespacecrunch,theArtMuseumhasbecomeincreasinglycautiousinconsideringacquisitionsanddonationsofart,insomecasespassingupopportunitiestostrengthenit'scollections.由于空間不足，藝術(shù)博物館在考慮購(gòu)買藝術(shù)品和接受藝術(shù)品捐贈(zèng)時(shí)越來越慎重，有些情況下甚至?xí)艞夁M(jìn)一步增加收藏品的機(jī)會(huì)。12知米背單詞學(xué)遍語，與單詞TheUnitedStatesConstitutionrequiresthatPresidentbeanatural-borncitizen,thirty-fiveyearsofageorolder,whohaslivedintheUnitedStatesforaminimumoffourteenyears.美國(guó)憲法要求總統(tǒng)必須是生于美國(guó)本土的公民，三十五歲以上，并且在美國(guó)居住至少十四年。AridregionsinthesouthwesternUnitedStateshavebecomeincreasinglyinvitingplaygroundsforthegrowingnumberofrecreationseekerswhoownvehiclessuchasmotorcyclesorpoweredtrailbikesandindulgeinhill-climbingcontestsorincavingnewtrailsinthedesert.美國(guó)西部不毛之地正成為人們玩耍的地方，對(duì)越來越多擁有摩托車或越野單車類車輛，喜歡爬坡比賽或開辟新的沙漠通道的人具有不斷增長(zhǎng)的吸引力。 .Stonedoesn’ecay,sotoolsoflongagohaveremainedwhenthebonesofthemanwhomadethemhavedisappearedwithouttraces.石頭不會(huì)腐爛，因此以前的（石器）工具能夠保存下來，雖然它們的制造者已經(jīng)消失的無影無蹤。Insectswouldmakeitimpossibleforustoliveintheworld.Theywoulddevourallourcropsandkillourflocksandherds,ifitwerenotfortheprotectionwegetfrominsect-eatinganimals.如果我們沒有受到以昆蟲為食的動(dòng)物的保護(hù)，昆蟲就會(huì)吞嚼掉我們所有的莊稼并殺死我們飼養(yǎng)的禽獸，使我們無法在這個(gè)世界上居住。Itistruethatduringtheirexplorationstheyoftenfaceddifficultiesanddangersofthemostperilousnature,equ