例如，他们不能解释水是怎样使土壤变暗的。

They cannot, for example, explain how the water darkened the soil.

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拉下窗帘使房间的光线变暗了。

Pull down the window shade subdue the light in the room.

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操控光亮：使周围的亮度变亮或变暗。

Control light. Adjust light levels up or down.

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操控光亮：使周围的亮度变亮或变暗。

Control light. Adjust light levels up or down.

youdao