Many of the hotels are located in cities where air pollution is a major concern, resulting in dirty ceiling, etc. Where air filtration is unsatisfactory.

• 很多宾馆都坐落在城市里,那里的空气污染是一个主要应该注意的,空气污染导致肮脏的天花板等等等等。空气过滤装置并不能令人满意。