They found that in unventilated spaces levels can build up and, over time, cause health problems such as allergies and asthma.
研究表明,在不透风里,时了,会影,出现过敏、哮喘等症状。
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The unventilated, deafening carpet workshops where labourers were sometimes chained to the looms and locked in at night.
通风不良、震耳欲聋的毯车间,工人们有时被布机上,晚上被里面。
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