烘托了主题
It highlights the theme
以上为机器翻译结果，长、整句建议使用 人工翻译 。
主会场外的大屏幕循环播出CCBN宣传短片，极大的烘托了现场气氛并成为主题报告会的又一大亮点。
The electronic screen outside the main venue played the promo of CCBN in loop, which greatly enhanced the atmosphere of the conference and constituted another feature of the keynote speeches.
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