On the other hand if you take a look at the shadow on the wall beneath the wood roofs, those appear brownish/redish because the light from the wood gets reflected on the wall and tints it that color.
另一方面如果你注意观察在木头屋顶下边的阴影，那里会呈现红褐色，因为木头反弹到墙面的颜色。
To be clear: From within the cave, inhabitants could only look at shadows on the wall and not the form itself that was casting the shadow.
更清楚一些的说：外形一直在洞穴中，居住者只能看到墙上自己的影子，却不能在影子上看到真正的自己。
He saw his shadow on the wall of the house opposite. The person in room13 was also standing at the window.
13号房间里的人也站在窗边，所以安得森先生在对面的墙上又看到了另一个影子。
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