Stoechiometer
[医] 化学计算器, 化学计量器
🗣️ 情景例句
We started by making safety equipment for many sports.
我们是以做运动产品的安全器材起家的。
One beats the bush, and another catches the birds.
坐享其成。
he could no get his arm out.
他的胳膊反倒退不出来了。