DVD的 评论音轨 ( Commentary Track )：DVD不但收录高质量的电影画面、音乐、对白、音效，而且增加了许多额外的花絮，电影创作者可以将更多的电影素材放到DVD里面去。
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PR firms are increasingly called on to track what consumers are saying about their clients online and to respond directly to any negative commentary.
客户越来越多地聘请公关公司跟踪网络上消费者对他们的看法，同时由公关公司直接回应任何负面评论。
On Weibo, you can have threaded converstaions, track commentary on posts, embed various media formats, view media within the same window, and sort by content type.
在微博上，你可以找到对话记录，追踪话题评论，在同一个窗口观看各种嵌入微博中的视频，根据内容类型进行分类。
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