O. n.
[医] 每夜
🧩 词语组成解析
[医] O型, 菌体型, 不动型(细菌)
abbr. 名词
🗣️ 情景例句
What's wrong with wanting to be on the school board?
想进入联合校董会有什么错？
You'll be on air in two minutes.
两分钟以后你会上电视。
I am in charge of the company when the manager is out.
经理不在时山我来管理公司。