Exradius
外径, 旁切圆直径
🗣️ 情景例句
Yeah, and I have to finish this report by four.
是，我在四点之前得完成这个报告。
It's time for me to have a meat.
是我吃饭的时间了。
The over-punctual can be as much a trial to others as the unpunctual.
早到的人同迟到的人一样令人讨厌。