Dimethylamine
n. [化]二甲胺
🗣️ 情景例句
Sit down, Susan.
坐下， Susan。
There is safety in numbers.
人多势众。
I've been working so hard recently that I haven't had any time for collecting new stamps.
最近我的学习一直很紧张，没有时间收集新邮票。