Recommended for high temperature dry air and some high temperature chemical products.
高温干燥的空气和一些高温的化学物，饮用水等。
The throwing of waste products into the ocean hurts the life in the sea, while waste gases change the chemical balance of the air and shut out some of the sun's necessary life – giving lights.
往海洋里排放污染物质给大海里的生命带来伤害，废气改变了空气中化学物质的平衡并且阻挡了一些太阳的益处——光明。
Chemical sprays like air fresheners,hair spray, household cleaning products and even strong perfumes can also trigger an asthma attack.
VOA: special.2009.07.28
Chemical sprays like air fresheners, hair spray,cleaning products and even strong beauty aids can trigger an asthma attack.
VOA: special.2010.09.07
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