【TOEFL核心词汇】No.38 锐利的
Hints：trichome n. [细菌][微] 毛状体
只听写例句。前面的单词不用听写。http://t1.g.hjfile.cn/listen/201212/201212060347014924343.mp3The external surfaces of plants often carry spiky hairs known as trichomes, which either prevent feeding by insects or may even puncture and kill insect larvae.植物表面常有绒毛状的刺儿，它可以防止被虫蛀，甚至可以杀死幼虫。
——译文来自: lvbufan
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