Fns
abbr. flask-nitrogen supply 细颈瓶氮供应品
🗣️ 情景例句
Stop being so moody.
不要这么喜怒无常。
Why does only one sock get lost at a time?
为什么袜子只丢了一只呢？
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