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(单词翻译)
Craig and Bernard did laboratory experiments showing that fruit flies are two to three times more likely to fly toward a simple web reflecting ultraviolet1 light than toward a web not reflecting it. Craig and Bernard also found that many spiders, especially those who forage2 near flowering plants, make non-ultraviolet-reflecting webs, then sometimes decorate the webs with special ultraviolet-reflecting silk laid down in flower-like patterns. The bodies of these spiders also reflect ultraviolet light. The two scientists observed webs built by a type of large garden spider in Panama and found that decorated webs with spiders present caught fifty-eight percent more insects per hour than undecorated empty webs.
收听单词发音
1
ultraviolet
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| adj.紫外线的;n.紫外线 | |
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2
forage
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| n.(牛马的)饲料,粮草;v.搜寻,翻寻 | |
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