Dicarboxylic
[化]二羧基的
🗣️ 情景例句
What do people usually do on that day?
在这一天，人们通常干什么？
Thanks for coming to help on such a short notice.
谢谢你临时来帮忙。
Excuse me. What's the time, please?
对不起，请问几点了？