Though the ad aims to convince people they ought not litter, the repeated images of people littering may promote littering by convincing viewers that everybody does it.

• 虽然广告的目的在于说服人们不要乱扔垃圾，但是它展示出的人们乱丢垃圾的丑象告诉人们，乱扔垃圾的现象十分普遍，也无形中助长了这种不良现象。