There, they keep other creatures in check, distribute seeds, and clean dead and decaying materials from the ground.

在那里，他们控制其他生物的数量，将植物种子带往各地，清除地面上衰败和腐烂的物质。

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Pairs of clean and unclean animals, of birds and of all creatures that move along the ground.

洁净的畜类和不洁净的畜类，飞鸟并地上一切的昆虫。

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By tackling the issue now it could regain the high moral ground (at the same time as forging ahead in the clean-energy business, which Europe might otherwise dominate).

把眼下这个问题解决好了，美国就能重新树立自己的道义形象(与此同时，还能在清洁能源业中迎头赶上，避免欧洲占去先机)。

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Surrounded by red limestone cliffs, the water comes from the ground and is so clean you can drink it.

CNN: Oasis from the ruins: Afghanistan opens first national park

On the ground they strip carrion clean.

BBC: Patagonia��s historic cowboy ranches

And has PM Manmohan Singh, the soft-spoken technocrat with a clean image, lost the "moral high ground", as a critic says?

BBC: Why is India's PM Manmohan Singh under attack?