Birth-death ratio
[医] 出生死亡比率, 生命指数
🧩 词语组成解析
birth
[bə:θ]
n. 出生;分娩;起源;出身;
ratio
['reiʃiəu]
n. 比，比率;比例;系数;
vt. 求出比值，除，使…成比例;将（相片）按比例放大[缩小];
🗣️ 情景例句
Have you ever studied French?
你学过法语吗？
Too much spoils, too little is nothing.
过多反坏事，太少不济时。
The most surprising thing about it, however, is that it can land anywhere: on snow, water, or even on a ploughed field.
雪地上，水面上，甚至刚耕过的田里。