空气和水的污染，植物和动物物种，人口过剩等过度。
Air and water pollution, overharvesting of plant and animal species, overpopulation and so on.
为保证无氧化气氛，空气过剩系数降低到0.95以下。
The air excess rate is reduced to less than 0.95 to secure the atmosphere non-oxidizing.
为保证无氧化气氛，空气过剩系数降低到0.95以下。
The air excess rate is reduced to less than 0.95 to secure the atmosphere non-oxidizing.
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