Exradius
外径, 旁切圆直径
🗣️ 情景例句
I could work out in your class with no problem.
如果我去你的班上做运动， 一定不会觉得有问题。
The post office is two blocks straight ahead, You can't miss it.
那邮局一直向前走过两条街，很好找。
Oh, yes. It is mine.
啊，是的！是我的！