大多数环境污染问题的存在，是因为过去没有采取适当的保护措。 Most environmental problems exist because adequate

游客2023-10-19 76

问题大多数环境污染问题的存在，是因为过去没有采取适当的保护措。

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答案 Most environmental problems exist because adequate measures for preventing them were not taken in the past.

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