Chemical oxygen demand(cod)
[化] 化学需氧量
🧩 词语组成解析
🗣️ 情景例句
That sounds fantastic. Where do I go to sign up for that tour?
那听起来好极了。我到哪里去报名参加呢？
He that never rode never fell.
不骑马就永不会从马上跌下。
The line's busy. I'll try again later.
电话占线，过一会我再打。