Parabromoacetophenone
对溴苯乙酮
🗣️ 情景例句
I don't know how to solve the problem. Will you help me out?
我不知道该怎么解决这个问题。你能帮我吗？
When is the most convenient time for us to meet?
我们什么时候见面最方便呢？
I don't think much of the movie.
我认为那电影不怎么样。