求翻译：公益广告，亦即社会广告，主要是指不以获取经济利益为直接目的的广告形式，它是面向社会大众，为公众利益服务的，以倡导或警示等方式传播某种观念，促进社会精神文明建设的非商业性广告；而企业的商业广告却是以追求利益最大化为目的的商业行为，商业广告和公益事业本来看似是相互对立的事物，但是随着现代社会的不断发展，广告业界的不断完善，互相对立也能转而相互促进、共同发展了，这就是公益广告商业化。是什么意思？

Public service ads, that is, social advertising, not to gain an economic advantage for the direct purpose of the forms of advertising, it is for the community, serve the public interest, to initiate or warning dissemination of a certain concept, the promotion of social spiritual civilization, non-co

Public service announcements, which is social advertising, it refers primarily to obtain economic benefits are not aimed directly at the forms of advertising, and it is to the Community, to serve the public interest to promote or warning dissemination, a concept and the promotion of social construct