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,在不透风的空间里,时间长了,会影响健,
过敏、哮喘等症状。
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,在不透风的空间里,时间长了,会影响健,
过敏、哮喘等症状。
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