Johnstrupite
氟硅铈矿
🗣️ 情景例句
World-class athletes are extremely fit.
具有国际水平的运动员体格非常好。
Great men's sons seldom do well.
大人物的子孙少出息。
Yes.He must remain in bed for another two days.
是的，他还必须卧床两天。