Whenever you see two, three by three matrices getting multiplied together, you should imagine, 1st applying the transformation encoded by the right one, then applying the transformation encoded by the left one.

当你看到两个3×3矩阵相乘时 你应该想象一下 首先应用由右边矩阵编码的变换 然后应用由左边矩阵编码的变换。