Tfr
[医][=total fertility rate]总生育率
🗣️ 情景例句
Excuse me, Mr. Carlson,
对不起 ，Carlson先生，
He always keeps his words.
他总是信守诺言。
The boys felt tired so they put out the fire and crept into their tent.
于是他们扑灭了篝火，钻进了帐篷。