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One must be a sea, to receive a polluted stream without becoming impure.
我们必须是大海，才能接受一条污流而不致变污。
youdao
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The air of a big city is often impure.
大城市的空气往往是污浊的。
youdao
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Impure drinking water is a cause of disease.
不洁的饮用水是引发疾病的一个原因。
youdao
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Impure drinking water is a cause of disease.
不洁的饮用水是引发疾病的一个原因。
youdao