Exradius
外径, 旁切圆直径
🗣️ 情景例句
You are twenty-one, a grown-up young lady old enough to make up your own mind.
你已经21岁了，已经到了可以自己做主的年龄了。
I would like to talk to Mr. Liu.
我想请刘先生来听电话。
No, it isn't. It's a Japanese car.
不是。那是一辆日本产的小汽车。