的皮毛深处，变成毛毛虫，并以它的脏毛为食。她的肌肉不能让他哪怕在很短的距离以内以每小时一公里的速度移动。它能做的最敏捷的动作就是挥一挥它弯曲的胳膊。r
86Artificialflowersareusedforscie
tificaswellasfordecorativepurposesTheyaremadefromavarietyofmaterialssuchaswaya
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aturalflowersr
86人造花卉即可用于科学目的，也可用于装饰目的，它们可以用各种各样的材料制成，臂如蜡和玻璃；其制作如此精巧，几乎可以以假乱真。r
87Threeyearsofresearchata
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87在伊利诺州A
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e市的一个废弃煤矿的三年研究取得了成果，科学家们相信这些成果可以帮助改造把美国产煤区弄得伤痕累累的数千个旧煤场。r
88Whe
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essofactuallybuildi
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esr
88当有关西部铁路的说服和规划工作终于完成后，真正艰难的任务还没有开始；即危险，吃力，需要伤筋动骨和吵吵嚷嚷的建造这些铁路的实际工作。r
89Becauseofthespacecru
chtheArtMuseumhasbecomei
creasi
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sideri
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somecasespassi
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89由于空间不足，艺术博物馆在考虑购买和接受捐赠的艺术品是越来越慎重，有些情况下放弃其进一步改善收藏的机会。r
90TheU
itedStatesCo
stitutio
requiresthatPreside
tbea
aturalbor
citize
thirtyfiveyearsofageorolderwhohaslivedi
theU
itedStatesforami
imumoffourtee
yearsr
90美国宪法要求总统是生于美国本土的公民，三十五岁以上，并且在美国居住了至少十四年。r
91Aridregio
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itedStateshavebecomei
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umberofrecreatio
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vehiclessuchasmotorcyclesorpoweredtrailbikesa
di
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ewtrailsi
thedesertr
91美国西部的不毛之地正成为玩耍的地方，对越来越多拥有摩托车或越野单车类车辆的，喜欢放纵于爬坡比赛或开辟新的沙漠通道的寻欢作乐者具有不断增长的吸引力。r
92Sto
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edwhe
eve
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esofthema
whomadethemhavedisappearedwithouttracer
92石头不会腐烂，所以以前的石器工具能保存下来，虽然它们的制造者已经消失的无影无踪。r
93I
sectswouldmakeitimpossibleforustolivei
theworldtheywor