Land cover and its natural alteration, which play an important role in climate system and biochemistry pattern in globe scale, have brought tremendous effect to global entironment.
土地覆盖和土地覆盖的自然变更，在地球系统的气候和生物化学全球尺度模式中扮演着重要角色，对全球生态环境产生着巨大的影响。
It doesn't take much water to wipe out the mosquito habitat, Carlson says, but any alteration of the natural environment has some adverse affects.
查尔森说，消灭这种蚊子的生存环境并不需要太多的水，但是任何对自然环境的改造都存在不利的一面。
We should be careful of alteration of the nature in order to balance the natural harmony with our interest.
我们应小心，改建的性质，以平衡自然的和谐，与我们的利益。
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