Percivalite
钠铝辉石
🗣️ 情景例句
when she goes back to Greece.
她回去希腊时。
While we were having breakfast,John was talking on the telephone.
当我们正在吃早餐时，约翰正在打电话。
Do you want beef or lamb?
您要牛肉还是要羔羊肉？