◎害虫hàichóng
[injurious insect] 凡直接或间接对人类有害的虫类。如苍蝇、蚊子,有的危害农作物,如蝗虫、螟虫、棉蚜
害虫是人类对一些动物（大多属于昆虫）的定义，这些动物往往会对人类的生活、生产产生负面影响…
◎蠹虫dùchóng
(1) [a kind of insect that eats into books,clothing,etc.;book motheating insect;vermin]
(2) 蛀蚀树木、器物的虫子
(3) 比喻从内部损害集体的坏人…