利用坐标轴的旋转和平移，导出了组合机床主轴箱多种传动形式下传动轴坐标计算的统一公式。

The unified formula results from the revolution and translational movement of the coordinate axis. Apart from the unified calculating formula, the idea for calculation is clear and distinct.

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从理论上讲，通过坐标轴旋转将二次方程化简为规范形式，从而讨论其曲线的形状，这已是讨论得相当明了的课题。

Theoretically speaking, it is a rather-clearly discussed subject to standardize the quadratic equation into the normal forms by spinning the coordinate axis so as to approach the shapes of its curves.

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在第②步中，采用旋转坐标轴的方法来计算非结构网格单元各边的通量。

In the gas evolution step, with the axis rotation, the flux through each side of the triangular element is obtained.

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Actually, the view of vectors we take nowadays is that vectors are associated with a pair of numbers which, on the rotation of axes, transform like this.

实际上,今天我们讲矢量所用的观点是,矢量是和一组坐标值相对应的,在坐标轴旋转的过程中像这样变换

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