Hints： trichome n. [细菌][微] 毛状体 只听写例句。前面的单词不用听写。
The 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