Tfn
[医][=total fecal nitrogen]总粪氮（量），粪内总氮量
🗣️ 情景例句
She's very pretty.
她很漂亮。
Business may be troublesome,but idleness is pernicious.
事业虽扰人，懒惰害更大。
I have the right to know.
我有权知道。