在蓝天反衬下山是灰色的。

The mountain is grey against the blue sky.

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混凝土表面反衬出日落的红色和橘色。

Rich red and orange sunset is to be reflected on the concrete surface.

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混凝土表面反衬出日落的红色和橘色。

Rich red and orange sunset is to be reflected on the concrete surface.

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