M-f
[医][=(male/female)ratio]男女比率，男女比例
🗣️ 情景例句
The rules ought to be observed.
这些规则就予以遵守。
The doctor advised me to get plenty of exercise.
医生劝我要多运动。
The story of a poor family that acquired fame and fortune overnight, dramatically illustrates the power of the press.
下面这户穷人一夜之间出名发财的故事戏剧性地说明了新闻报道威力。