Density ratio
[计] 密度比
🧩 词语组成解析
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
My mother is a housewife and my father is retired.
我妈妈是家庭妇女，我爸爸退休了。
What's so funny?
什么事那么好笑？
I spent the whole day in my room, but I did not write a single card!
我在房间里关了整整一天。然而竟连一张明信片也没写成！