Tractrix
等切面曲线, 曳物线
🗣️ 情景例句
Harry, would you like to see a menu? Harry
你想看看菜单吗？
No, I don't want to.
不，我不希望那样。
and it spread to Britain where wild rabbits are regarded as a pest but where domesticated rabbits,equally susceptible to the disease, are the basis of a profitable fur industry.
这种疾病又蔓延到了英国。在英国，野兔被当作有害的动物，可是家兔是赚钱的毛皮工业的基础，然而家兔同样易感染这种疾病。