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Today, we will learn how lighting changes an object's appearance in photography.
今天，我们来学习光线如何改变物体在照片中的呈现效果。

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First, take one photo of a stationary object from your starting position.
首先，站在原地给一个静止的物体拍一张照片。

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Next, walk three steps to the right and take a second photo of that exact same object.
然后，向右走三步，再给同一个物体拍一张照片。

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When you compare them, you will clearly see how this small change in position affects the shadows.
把两张照片放在一起比较，你就能清楚看到，位置稍微变化会如何影响阴影。