By regulating water for the world's great rivers, trees secure water quality and supply water for close to half of the world's largest metropolises - including New York City.
通过调节世界几大河流的水，树木能够保证水质并为包括纽约市在内的近二分之一的世界最大都市提供用水。
Bacteria are not only an integral component of food webs, but also play a key role in controlling and regulating water quality in lake ecosystems.
细菌不仅是湖泊系统食物网的重要组成部分，同时在控制和调节湖泊水质方面发挥着重要作用。
Regulating water quality, improve the taste and ensure water quality-Namsoon appetizers.
调节水质，改善口感，确保水质清淳可口。
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