Tkn
[医][=total kjeldahl nitrogen]总克氏氮
🗣️ 情景例句
So now I'm taking a flight on Monday instead.
所以我现在要改搭星期一的班机走。
We have a toll-free number for customers to call.
我们对顾客提供免费服务电话。
Last Tuesday he received a letter from the local police.
上星期二他收到当地警察局的一封信，