Elatrometer
[化] 气体密度计
🗣️ 情景例句
John Marchetta.
我是 ，John Marchetta。
How is Amy?
爱米好吗？
By the way, I came into this classroom last Saturday morning, and it was not as clean as usual.
顺便提一句，上星期六上午我来到这个教室时