外施壳寡糖能提高作物 抗逆性，而且无毒不引起环境污染，使用方法简单。
The external application of the Chitosan oligosaccharide can improve the stress resistance of the crops, is free from toxicity, causes no environmental pollution, and is simple in usage.
而其中渗滤液对地表水和地下水的污染已经非常突出，是引起环境污染的主要原因之一。
The leachate of landfill pollute the surface water and the ground water, and it is one of the primary factors for pollution of environment.
能引起环境污染和环境退化的全球经济活动总量居高不下，尽管它的重点已经转向了世界各地。
Our global economy's toll in pollution and degradation of the environment remains high, though its focus has shifted around the globe.
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