春天来了,妈妈会将冬天穿的棉衣收进箱子里,并放上几颗樟脑丸。可是,等下一个冬天将棉衣拿出来时,樟脑丸不见了,这是为什么呢?A:樟脑丸是由樟树叶的提取物制成的。纯净的樟脑是白色或无色透明的菱形晶体,很香。但是,这个气味对于爱吃毛料衣物、书籍等的蠹鱼来说是受不了的,因此人们就将樟脑 Spring is coming, mother will put winter coat into the box, and put a few mothballs. However, the mothballs disappear when the next winter coat is removed. Why is this? A: The mothballs are made from the extract of camphor leaves. Pure camphor is a white or colorless crystal diamond, very fragrant. However, this smell is unbearable to the cichlids that love to eat wool clothing, books, etc., so people will camphor