Evolvent
渐开线, 切展线
🗣️ 情景例句
And the Levinsons thank you for bringing their dog to us.
Levinson夫妇也谢谢你把他们的狗送来。
There are some feelings that time cannot benumb.
人类的感情是历久不衰的东西。
but she is never sufficiently strong-minded to be able to stop the practice.
但她又缺乏足够坚强的意志把这一收集活动停下来。