二氧化氮

Levels of nitrogen dioxide currently exceed the World Health Organization's clean-air guidelines by 78%.

北京空气中的二氧化氮含量目前已经比世界卫生组织制定的清洁空气标准高出了78%。

Climate change is being caused by common greenhouse gases such as carbon dioxide, methane and nitrogen dioxide.

气候变化是由一些普遍的温室气体，如二氧化碳，甲烷，二氧化氮等引起的。

Sulfur dioxide, nitrogen dioxide emissions by more than 56%.

二氧化硫、二氧化氮排放降低56%以上。

The concentrations of nitrogen dioxide and ozone also exceed the objectives for a few days in a year.

二氧化氮及臭氧的浓度，每年也有几天超出了空气质素指标。

As long as there is ozone or nitrogen dioxide and sunlight present, other undesirable reactions will occur.

只要臭氧或二氧化氮与阳光同时出现，其他不想要的反应就会发生。

Levels of nitrogen dioxide in the city exceed the World Health Organization's clean-air guidelines by at least 78%.

与世界卫生组织对洁净空气的指导性标准相比，北京空气中二氧化氮浓度至少高出78%。

Researchers also blamed exposure to nitrogen dioxide, carbon monoxide and particulates for the increase.

研究人员还指责了二氧化氮，一氧化碳和颗粒物的增加问题。

Health effects: Nitrogen dioxide can lower resistance to respiratory infections.

健康的影响：二氧化氮可降低抗呼吸道感染。

Persistent pollution is still seen as a major problem in Beijing, with levels of nitrogen dioxide surpassing the World Health Organization's clean-air guidelines by 78%.

持续无法改善的污染状况仍被认为是北京面临的一大难题，大气中的二氧化氮含量比世界卫生组织认定的正常标准高出了78%。

Oxide to form nitrogen dioxide and oxygen.

应，形成二氧化氮和氧气。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。