spherical coordinates造句

1、OK, let's see, who had seen spherical coordinates before just to see?
我看看，谁曾经学过球坐标么？

2、There we want to think a tiny bit about spherical coordinates again.
我们需要再次考虑球坐标。

3、But let's do it in spherical coordinates because that's the topic of today.
但我们用球坐标来做，因为这才是今天的主题。