Chalkogenide
硫属化物
🗣️ 情景例句
We are postponing our trip until the weather grows warmer.
我们拟把旅行推迟到天气暖和的一些时候。
I'm not myself today.
我今天心神不宁。
The winch was again put into operation and one of the men started up the truck.
绞盘机再次启动，一位工人发动了急修车的引擎。