The doors are pervious to wind.

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，在透风的空间里，时间长了，会影响健康，出现过敏、哮喘等症状。

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，影响健康，出现过敏、哮喘等症状。

The doors are pervious to wind.

那些门透。

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，在不透间里，时间长了，会影响健康，出现过敏、哮喘等症状。

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，在不透风的空间里，时间长了，会影响健康，出现过敏、哮喘等症状。

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，出现过、等症状。

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，出现过敏、症状。

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，出现过敏、哮喘等症状。

The doors are pervious to wind.

那些门透。

They found that in unventilated spaces levels can build up and, over time, cause health problems such as allergies and asthma.

明，在不透的空间里，时间长了，会影响健康，出现过敏、哮喘等症状。

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，不透风的空间里，时间长了，会影响健康，出现过敏、哮喘等症状。

The doors are pervious to wind.

那些门。

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，在的空间里，时间长了，会影响健康，出现敏、哮喘等症状。