中国饲料添加剂信息网-新闻中心 关键词 ：分离；优势菌；净化剂；改善水质 [gap=747]Key Word ：separation；preponderant bacteria ；purificant；improve water quality
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他们保持我们的空气清洁，减少噪音污染，改善水质，提供食品和建筑材料。
They keep our air clean, reduce noise pollution, improve water quality and provide food and building materials.
政府在改善水质上投入了多少资金？
How much has the government spent improving the water quality?
政府鼓励农民种植玉米而非水稻，以改善水质。
The government encourages farmers to grow corn instead of rice to improve water quality.
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