• Economical and effective control of pollution by ammonia-nitrogen waste water is a vital problem currently.

    经济有效地控制废水污染当前面临重大课题

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  • Ammonia is the feed stock to make nitrogen-based fertilizers.

    氮基,化肥原料

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  • There was little growth apparent when ammonia as a sole nitrogen source.

    作为唯一时,它对细菌的生长无刺激性

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  • There was little growth apparent when ammonia as a sole nitrogen source.

    作为唯一时,它对细菌的生长无刺激性

    youdao

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