Some studies proved that the reason of decreasing sperm quality were the result of environment' destruction.

研究也表明，造成其急剧下降的因素与环境污染加剧有很大关系；

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Some studies proved that the reason of decreasing sperm quality were the result of environment' destruction.

研究也表明，造成其急剧下降的因素与环境污染加剧有很大关系；

youdao