14 词条主页 > 词条 > 拉丁美洲西班牙语 (XL) > óxidos de nitrógeno
óxidos de nitrógeno
Products of combustion that contribute to the formation of smog and ozone.
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panda
A panda is a black and white bear with black patches around its eyes, ears, arms and legs. Pandas are native to central-western and south western ...
