4only after studies provided evidence of the harmful effects of this program , has it been possible to modify tv programming policies 除非研究提供证据表明这个节目的不良影响,否则电视节目的播放政策不可能改变。
Only after studies provided evidence of the harmful effects of such programs has it been possible to modify tv programming policies 仅仅在研究提供了这些程序有害性影响的证据以后,修改电视程序的政策才成为可能。
Only after studies provided evidence of the harmful effects of this program , has it been possible to modify tv programming policies 译文:除非研究提供证据表明这个节目有不良影响,否则电视节目的播放政策不会改变。
Only after studies provided evidence of the harmful effects of such programs has it been possible to modify tv programming policies 只有在研究提供出这些节目产生有不良影响的证据后,才有可能更改电视节目播放的政策。
Only after studies provided evidence of the harmful effects of such programs has it been possible to modify tv programming policies 只有在经过研究分析后才能得到这些程序已经可能修改电视程序设计政策的有害影响的证据。