锐度– 是指图片焦点是否对准。

SHARPNESS - refers to whether an image appears to be in focus.

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在上面的这幅图片里，天空有很多种材质——太阳的亮部，云的细节构成了一个显著的焦点。

In the first photo above, there is much texture in the sky – the highlights of the sun and detail of the clouds make it a prominent focal point.

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管这种屏幕离你的视网膜之有几毫米远，但只要焦点选择正确，你仍旧可以看到清晰的图片。

This screen is a few millimeters away from your retina, but as long as the focus is right, you can still see a clear picture.

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