5 二十分两句话
Nitrogen Oxides
1 Nitric oxide is the primary contaminant and is formed by all high-temperature,atmospheric combustion by the direct combination of nitrogen and oxygen.
2 In the presence of sunlight,nitric oxide combines with atmospheric oxygen to form nitrogen dioxide as a secondary contaminant.
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参考答案:Nitrogen Oxides
氮氧化合物
1 Nitric oxide is the primary contaminant and is formed by all high-temperature, atmospheric combustion by the direct combination of nitrogen and oxygen.
1.
氮的化合物是主要的污染物,并且它通过氮和氧在高温下燃烧直接形成. 2 In the presence of sunlight, nitric oxide combines with atmospheric oxygen to form nitrogen dioxide as a secondary contaminant.
2.
在光和作用下，氮的化合物舆大气中的氧结合形成第二大污染物二氧化氮.