Let's check what we had for polar coordinates.
我们来回顾一下极坐标。
And I would like to switch that to polar coordinates.
把它转换到极坐标系下。
Or I can use polar coordinates,and it works a little bit better that way.
或者还是用极坐标系，这比直角坐标系更好。
The claim is we are able, to do double integrals in polar coordinates.
这也就说明了，可以用极坐标做二重积分。
And, of course, we know also how to set up these integrals in polar coordinates.
当然，我们也知道，怎样用极坐标来计算这些积分。
And, of course, we know also how to set up these integrals in polar coordinates.
当然，我们也知道，怎样用极坐标来计算这些积分。
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