Dibromoacetone
二溴丙酮
🗣️ 情景例句
Designing dresses is a career
设计时装是一种职业
That's a good idea.
那是一个好主意。
and at the most critical juncture we took turns in watching that point.
在最紧急的时刻，我们轮流监视那段河流的险情。