Tractrix
等切面曲线, 曳物线
🗣️ 情景例句
Without a doubt, things will get worse.
情况无疑会越来越糟。
It's up to you.
由你决定。
One of the most famous sailing ships of the nineteenth century, the Cutty Sark, can still be seen at Greewich.
人们在格林威治仍可看到19世纪最有名的帆船之一“卡蒂萨克”号。