Tkn
[医][=total kjeldahl nitrogen]总克氏氮
🗣️ 情景例句
It's none of my business, but I think you ought to work harder.
这不关我的事，但我想你应该更加努力地工作。
Never fry a fish till it's caught.
捉到鱼，才煎鱼。
He has been sick for three weeks.
他已经病了几周了。