你把镜头对准令人赞叹的山峰，或者蜿蜒曲折的河流，按下快门后你去看数码相机的显示屏幕——一棵淘气的树像牧羊人那样站在那里遮挡了你的镜头。

You aim at some astonishing peak or a swerve of the river, then examine the screen on the back of your digital camera. A rogue, blurring tree has dived across like a goalkeeper to block your shot.

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如果你的相机的温度很低，然后你直接把相机带到温暖的屋里，相机上马上就会凝结出水珠，镜头的镜片也会出现雾气。

If the camera gets very cold, and you then bring it directly into a warm house, condensation can form and fog the lens.

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