It has been proved that sorting out your desk can improve your learning and working efficiency.

事实证明，整理你的桌子可以提高你的学习和工作效率。

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It has been proved that Low Till Farming increases harvests and reduces water use, and this method reduced the need for chemical products because there are fewer unwanted plants.

实践证明，低耕农业提高了作物产量，减少了用水量；而且，由于有害植物变少了，这种农业对化工产品的需求也降低了。

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It has been proved that his point is wrong.

他的观点是错误的，这点已经被证实了。

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It has already been proved that deaf birds, who cannot hear their own voices, soon develop a distorted song.

BBC: NEWS | Science/Nature | Sleep helps birds sing better