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1·The thesis demonstrates the feasibility of natural ventilation to control concentration of noxious gas in the sewer tunnel.

并论证利用自然风稀释污水隧道内有害气体浓度的理论可行性。

2·Because these accident's occurrence mainly in the industry environment USES flammable explosive, the virulent noxious gas to create improper.

这些事故的发生主要因为工业环境中使用易燃易爆、有毒有害气体不当造成。

3·The utility model can not only prevent the dust and noxious gas in the air from entering the water box but also purify the water quality with an excellent effect.

本实用新型既可以防止空气中的灰尘、有害气体等进入水箱，又能很好地净化水质。

4·The positive effect of the utility model is to dissolute the waste rubber in comparatively low temperature without making noxious gas and with high recovery ratio and high automation.

本实用新型产生的有益效果是，将废旧橡胶在较低温度下进行分解，不产生有毒气体，回收利用率高，自动化程度高。

5·Enriching landscape structure and vertical artistic helps to increase green quantity, decrease heat island effect, deduce noise and noxious gas. The urban ecological environment has been improved.

丰富城区园林绿化的空间结构层次和城市立体景观艺术效果，有助于进一步增加城市绿量，减少热岛效应，洗尘、减少噪音和有害气体，营造和改善城区生态环境。

6·Most important, smell disorders can be downright dangerous for those who cannot detect the odor of smoke, burning or spoiled food, natural gas or other noxious aromas.

最为重要的是，嗅觉障碍对那些不能够觉察到烟味、烧焦味、食品馊味、天然气或其他有毒气体味道的人来说危险到极点。

7·It affords the gas which vivifies and warms our frames, and receives into itself that which has been polluted by use and is thrown off as noxious.

它所提供的气体温暖我们的住处，并由于人类使用而产生污染的有害气体。

8·Hydrogen sulfide is a noxious industrial gas. Recovering hydrogen sulfide from industrial waste gas can not only protect the environment but also provide cleaning energy - hydrogen and sulfur.

硫化氢是一种有毒的工业废气，从硫化氢中制取硫磺和氢气不但可以回收硫化氢，而且可获得清洁能源氢气和硫磺。

9·The noxious hot - weighty gas subsiding to ground will be harm to human and plants.

有毒热重气体沉降到地面会对人和动植物造成危害。