Bismuthyl
氧铋基
🗣️ 情景例句
Excuse me, Mr. Carlson,
对不起 ，Carlson先生，
Empty vessels make the greatest sound.
空桶响声大。
We're going to spend three days in the country.We're going to stay at my mother's for the weekend.
我们打算到乡下去三三，在我母亲家度周末。