Nonself
n. (有机体的)异物
🗣️ 情景例句
You won't believe it, Grandpa,
你绝不会相信， 爷爷，
Help the dog over the stile.
助人度过难关。
Many firms, for instance, have great difficulty in obtaining technical or scientific books from libraries
比如，很多公司向图书馆借阅科技书籍时感到很困难，