Tfn
[医][=total fecal nitrogen]总粪氮（量），粪内总氮量
🗣️ 情景例句
Have the fittings here, too.
也在这里试穿。
Nothing to be got without pains but poverty.
只有贫困可以不劳而获得。
No. Two visitors have just arrived and I want to give them something nice to eat.
不是。我家刚来了两位客人，我想煮些好吃的招待他们。