Fire is the primary hazard associated with gaseous oxygen.

火是同气态氧相联系的主要危险。

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Therefore, after 35 years old, smoking is causes the most primary hazard factor which the lung function drops, the no-smoking drier to the COPD patient's profit to be bigger.

所以，35岁后吸烟是导致肺功能下降的最主要危险因素，戒烟越旱对COPD患者的益处越大。

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The food treatment correction blood fats disorder blood fats disorder causes the primary hazard factor which the arteriosclerosis, coronary disease and the brain courage and uprightness form.

血脂紊乱是引起动脉硬化、冠心病和脑血性形成的主要危险因素。

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