The noise, unclean air and chemical pollution have become the three disasters threatening human health.

噪声、空气不洁和化学物污染已成为当今威胁人类健康的“三大公害”。

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The noise, unclean air and chemical pollution have become the three disasters threatening human health.

噪声、空气不洁和化学物污染已成为当今威胁人类健康的“三大公害”。

youdao