这是不合理的，但是，这也是正常的人类行为。
As irrational as this is, however, it's also normal human behavior.
很久以前，人类行为被认为是非理性的，甚至似乎是不合理的。
Since long time ago, human behavior was thought as irrational, even not quasi-rational.
人类不合理的开发行为给土壤环境带来了沉重的负面影响，主要表现为土壤沙化、土壤侵蚀、土壤盐渍化、土壤污染等。
Human's irrational development activities have brought serious effects to soil environment, such as desertification, soil erosion, salination, and contamination etc.
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