This irritant gas is crucial to the well-being of the life on our planet.

这种刺激性气体对我们星球上生命的安康至关重要。

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The occupational main hazard substances that the subjects contacted were organic solvent, productive dust and noise, irritant gas, metal poison.

职工接触的职业有害因素以有机溶剂、粉尘和噪声、刺激性气体、金属毒物为主。

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Then it gets rather more high-tech. Capua's high-vacuum, low-temperature equipment removes bergaptene, an irritant, from the oil; and it is then stored under nitrogen gas to stop it oxidising.

后来萃取的方法更加更高科技化了，卡普阿公司的高压低温设备能将刺激物，bergaptene(一种脂)与油分离；然后将香油储存在氮气中防止其氧化。

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But the traffic increase has slowed progress in reducing emissions further, and people in many areas still suffer from nitrogen-related air pollution, including small particulates that get sucked deep into the lungs, and ground-level ozone - a strongly irritant gas formed by the action of sunlight on reactive nitrogen.

BBC: Nitrogen pollution 'costs EU up to ?280bn a year'