The penomena of annual water yield increase following the cut down of the forest was generally observed at the worldwide scale.
从世界各国的研究来看，普遍的研究结论认为森林减少可以增加流域年产水量；
The penomena of annual water yield increase following the cut down of the forest was generally observed at the worldwide scale.
从世界各国的研究来看，普遍的研究结论认为森林减少可以增加流域年产水量；
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