we should avoid the pollution of environment
英语阅读one day in February of 1860,Abraham Lincolnwas invited to.give aspeech in Brooklyn,New York.答案
其实就是保护环境。protect environment
environmental friendlydo not contaminate the environment
we should prevent our environment from being polluted
污染的水引起多种疾病，诸如腹泻，肠炎等
防止水污染 [词典] water conservation; [例句]第三，为了防止水污染，我们必须阻止那些乱排废水工厂。Third, in order to prevent water pollution, we must stop those indiscriminate row wastewater plant.
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