Verdite
铬云母
🗣️ 情景例句
We have a baby now.
我们现在有一个小宝宝了。
Let me tell you the story of my experience.
让我告诉你们我的亲身经历吧。
Imagine a pen attached to the weight in such a way that its point rests upon a piece of paper on the floor.
假定把一支笔拴在重物上，笔尖落在地板上的一张纸上，