Tractrix
等切面曲线, 曳物线
🗣️ 情景例句
No, I'm not kidding.
不， 我不是说笑。
It's all personal effects.
这些东西都是我私人用的
After a time, we noticed a snake charmer with two large baskets at the other side of the square,
过了一会儿，我们注意到广场的那一边有一个带着两个大筐的耍蛇人，