英语
西班牙语
英语
西班牙语
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单语范例（未经PONS编辑处理）
He preferred to remove hay storage from its traditional loft over the stables to eliminate dust infiltration and ammonia pollution.
en.wikipedia.org It was later found that the ammonia cars were empty and that the smell was residue that was released into the air.
en.wikipedia.org Urea was hypothesized to be the source of urinary ammonia during this time and was confirmed in 1817.
en.wikipedia.org Oxidation of the ortho isomer gives the benzoic acid derivative that then is cyclized with ammonia and neutralized with base to afford saccharin.
en.wikipedia.org Ammonia is a typical refrigerant and may be used as the primary working fluid.
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