Exradius
外径, 旁切圆直径
🗣️ 情景例句
Yeah.
是的。
Knowledge advances by steps not by leaps.
知识的获得是循序渐进而不是突飞猛进的。
Gandhi won his first non-violent struggle against racial discrimination.
甘地赢得了第一次反种族歧视的非暴力斗争的胜利。