Picrofluite
氟镁石
🗣️ 情景例句
I've got plenty of time.
我有的是时间。
Now, shall we begin?
现在，我们开始吧。
He did very badly on the exam----worse than expected almost the worst in the class.
他考的不好，比期望的还糟。几乎是全班最差的。