M-f
[医][=(male/female)ratio]男女比率，男女比例
🗣️ 情景例句
Yes. I do.
是的， 我有疑虑。
It's a long story.
说来话长。
The workmen told him to do as he pleased and the policeman telephoned for help.
工人说，悉听尊便。警察去打电话叫人。