The doors are pervious to wind.
那些门透风。
The doors are pervious to wind.
那些门透风。
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,会影响健康,出、哮喘等症状。
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