1、OK, let's see, who had seen spherical coordinates before just to see?
我看看，誰曾經(jīng)學(xué)過球坐標么？

2、There we want to think a tiny bit about spherical coordinates again.
我們需要再次考慮球坐標。

3、But let's do it in spherical coordinates because that's the topic of today.
但我們用球坐標來做，因為這才是今天的主題。

spherical coordinates翻譯