Nitrosoamine
n. [化] 亚硝胺
🗣️ 情景例句
My visa is multi-entry; it allows me to exit the country and then re-enter, as ofter as I like.
我的签证是往返签证，我可以随便进出这个国家。
I've got a pain in my back.
我背疼。
Two main techniques have been used for training elephants,
驯象有两种主要的方法，