Exradius
外径, 旁切圆直径
🗣️ 情景例句
This is something you'll have to work out yourself.
这就是你必须自己做出决定的事情。
Many a true word is spoken in jest.
戏言寓真理。
On, in just a day or two, I think.
哦，我想就这一、两天吧。