Epicycloids
(epicycloid 的复数) n.[数]圆外旋轮线, 外摆线
🗣️ 情景例句
It's a big decision for me, Bill.
对我来说这是个大决定， Bill。
Do you have shampoo here?
这儿有香波卖吗？
You see, on the morning of the murder, the 8 o'clock train did not run at all.
您看，在凶杀发生的那天早晨，8点钟的那次车根本没有发。