The perception of this polluted air can trigger annoyance as well as irritative responses or even be associated with general symptoms and behavioral changes well below established guideline levels.

• 感觉到这种污染空气的存在能引发被烦扰和不快的反应，即使污染排放量远远低于所规定的标准水平也会与一般的病症和行为变化联系在一起。