Fns
abbr. flask-nitrogen supply 細頸瓶氮供應品
??? 情景例句
Stop being so moody.
不要這么喜怒無常。
Why does only one sock get lost at a time?
為什么襪子只丟了一只呢？
By the way, I came into this classroom last Saturday morning, and it was not as clean as usual.
順便提一句，上星期六上午我來到這個教室時