Epicycloidal
圓外旋輪線的
??? 情景例句
I took a month off for a holiday.
我休了一個月假。
It is better to fight for good than to rail at the ill.
與其抱怨，不如積善。
Of course, New York is the ideal place for such an interesting study, because there is no shortage of tall buildings.
當然，紐約是進行這種有趣的試驗的一個理想的地方，因為那里根本不缺乏高樓大廈，有的是高層的窗檻從上往下墜落。