Practicallyallspeciesofanimalscommunicateeitherthroughsoundsorthroughalargerepertoryofsoundlesscodes.
时间:2016-08-25
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Thesteadilyrisingcostoflaboronthewaterfronthasgreatlyincreasedthecostofshippingcargobywater.
时间:2016-08-25
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Injudgingourworkyoushouldtakeintoconsiderationthefactthatwehavebeenverybusyrecently.
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ThereisalwaysexcitementattheOlympicGameswhenanathletebreaksapreviousrecordofperformance.
时间:2016-08-25
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Medicinedependsonotherfieldsforbasicinformationparticularlysomeoftheirspecializedbranches.
时间:2016-08-25
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Americasemphasisontheimportanceofeducationforeveryonehasspurredscientificresearch.
时间:2016-08-25
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Thedevelopmentofthetransistorandintegratedcircuitsrevolutionizedtheelectronicsindustrybyallowingcomponentstobepackagedmoredensely.
时间:2016-08-25
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SincetheGreatDepressiontheUnitedStatesgovernmenthasprotectedfarmersfromdamagingdropsingrainprices.
时间:2016-08-25
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PhotojournalistMargaretWhitebecamefamousforhercoverageofsignificanteventsduringtheSecondWorldWar.
时间:2016-08-25
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Whendovesareabouttwoweeksoldtheyarecoveredwithgreyfeathersandarereadytotrytheirwings.
时间:2016-08-25
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Nervesignalsmaytravelthroughnerveormusclefibersatspeedsashighastwohundredmilesperhour.
时间:2016-08-25
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