People are usually not aware that they are being monitored. But when the MRT is running, the driver may suddenly announce, "Would the woman in the red dress please refrain from eating."
一般人平時或許對於被監視毫無所覺，但當捷運行駛中，司機廣播聲突然響起：「穿紅衣服的小姐，請別吃東西！」