Phosphinyl
氧膦基
🗣️ 情景例句
How much time will it take for my mail to get to where it is going?
我的信件到达它要去的地方要用多少时间？
I came here when I was 20.
我二十岁来这儿。
What are you going to do this evening. Jill?
今晚你打算干什么，吉尔？