您需要使用其他方法将该子元素从局部坐标系转换到内容坐标系。

You need some extra methods to convert that item from its local-coordinate system to its content-coordinate system.

youdao

这道题最合适的方法，应该在极坐标系里面计算。

OK, the right way to do this will be to integrate it in polar coordinates.

youdao

下面的图表描述了几种常见的方法在坐标系中的位置。

The following chart illustrates where several popular methods appear along these dimensions.

youdao

So, there is a way to go from the unprimed coordinates to the prime coordinate by rotating your axis and actually calculating the components.

现在我们有一种方法可以从原坐标系,转变到新坐标系,只要旋转坐标轴,并实际地计算一下坐标即可

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