Paroxypropiophenone
对羟基苯丙酮
🗣️ 情景例句
Three things?
三件事？
How long have you been studying English?
你学了多长时间的英语了？
Holiday hotels tend to cater for one nationality of visitors especially, sometimes exclusively.
假日旅馆有只接待来自一个国家的旅游者的倾向，有时会达到排他的程度。