Bertrandite
羟硅铍石
🗣️ 情景例句
I don't think there will be a problem, you can move in straight away.
我认为这没什么问题，你可以马上搬进来。
Would you mind if I took a day off?
我请一天假可以吗？
They are working hard on the farm. The children are picking apples.
他们正在农场卖力地干活。孩子们在摘苹果。