Epitrochoid
[机] 外转轴线
🗣️ 情景例句
Are all the classes within walking distance?
所有的教室都在步行范围之内吗？
Out of sight, out of mind.
久违情疏。眼不见，心不烦？
The Ombudsman's prompt action at once put an end to an unpleasant practice which might have gone unnoticed.
司法特派员及时采取的行动，迅速制止了这一起不愉快的事件，不然这件事可能因未得到人们注意而不了了之。