Tractrix
等切面曲线, 曳物线
🗣️ 情景例句
Hello. Is Mrs. Montefiore there?
喂， Montefiore太太在吗？
In books,are embalmed the greatest thoughts of all ages.
伟大思想古今有，载入书中成不朽。
It obviously could not tell the difference between Indian music and jazz!
显然，它分辨不出印度音乐和爵士乐！