C5
[医] 溴化五烃季胺, 溴化次戊基三甲季铵
🗣️ 情景例句
How are you doing, Richard?
现在怎么样， Richard？
We must listen carefully to the teacher.
我们必须注意听老师说的话。
Excuse me, I must go.
请原谅，我得走啦。