Hypotrochoid
[机] 内转迹线
🗣️ 情景例句
I think it looks great, thank you.
我觉得它看起来不错， 谢谢！
I like to play tennis,but I'm not a very good player.
我喜欢打网球，但是我不是一个很好的运动员。
I felt sure I would never be able to close the case again.
我相信那箱子再也关不上了。