其实，上面一段引文中的第二个minute并非时间单位。 它不是我们熟知的“分钟”，而是角度单位：分。

The quote mentioned how many minutes the ship saileth in an hour, and the reason for this is that in this case a minute isn’t a unit of time, but a measurement of angle.

youdao

我之前谈过经度（longitude）和纬度（latitude），它们是用来标度连接两极的经线、以及平行于赤道的纬线的角度单位。

The other day I talked about longitude and latitude which are measured as angles around the equator and toward the poles.

youdao

实际上，是以单位角度旋转。

Actually, we are rotating at unit angular speed.

youdao