Carboxylic
[机] 羧基的
🗣️ 情景例句
Sorry, Richard. They don't have it.
对不起 Richard 他们那里没有。
No,I wasn't .
不，我没有在这里。
Oh, by the way, there was a telephone call for you.
啊，顺便说一句，有你一个电话。