Cycloid
n. 摆线, 轮转线\\na. 圆形的, 循环性格的
🗣️ 情景例句
Yes, this is my youngest son Robbie.
是的 这是我的小儿子Robbie。
If he doesn't, will you paint it?
如果他不，你会油漆它吗？
But that was not all.
它一再重复这些圆圈。