Look, the public service advertisements on preventing AIDS can be seen everywhere.
你看，到处都是预防艾滋病的公益广告。
Public service advertisements are meant to teach us and help us lead better lives.
公益广告旨在教导大众，为改进人们的生活提供帮助。
Public service advertisements are meant to teach us and help us lead better lives.
公益广告旨在教导大众，为改进人们的生活提供帮助。
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