physical and chemical states
... 物化性质 physicochemical properties 物化状态 physical and chemical states 物理 physics ...
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physical and chemical states
物理和化学状态
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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This paper states ammonia's physical and chemical characteristics, its source, the damage to hu- man body and effect factors of ammonia pollution. It also states its prevention method.
本文主要通过对氨的物理化学性质、室内空气中氨的主要来源、氨对人体的危害及室内空气中氨污染的影响因素及防治方法这几个方面来讲述。
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