Chalkogenide
硫属化物
🗣️ 情景例句
If you are going to come over, make suer it's during our summer.
如果你打算过来，记得我要在我们的夏季过来。
When would you like to leave?
你要什么时间离开呢？
You haven't finished your lunch!
你没吃完午饭！