Ibit
氧碘鞣酸铋
🗣️ 情景例句
There are several tours of the Grand Canyon.
到大峡谷有好几个旅游团。
Fine. I'd like to reserve one for next Tuesday.
好。我想预定一辆，下星期二用。
I don't know. sir.
我不知道，先生。