Beryllia
氧化铍
🗣️ 情景例句
Well, I have an appointment now, I'll have to go.
嗯，我还有一个约会，我得走了。
Politeness is to do and say the kindest thing in the kindest way.
文雅就是善良地做事，和善地说话。
That's a problem we Chinese must pay special attention to.
这是我们中国人必须特别注意的问题。