Rotate the image ninety degrees counter-clockwise.
将图像按逆时针旋转九十度。
The second toe of your front foot should point ninety degrees to the side.
前腿的第二个脚趾应该转向九十度的方向。
For example, many of the photos I take with my digital cameras are rotated ninety degrees, as they are taken as portraits.
例如，我用数码相机所拍摄的许多照片都旋转了九十度，因为我是把相机竖过来拍摄它们的。
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