... 在适当时候at an appropriate time 收视率调查公司rating agency （comm） 收费电视公司pay-tv operators ...
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美国广播公司的高管称，《迷失》DVD销量、视频点播量和iTunes下载量领先整个行业，这几方面的观众有数百万，尼尔森公司(Nielsen)的收视率调查没有将其计入。
'Lost' is an industry leader in DVD sales, video-on-demand and iTunes downloads, which add several million viewers not included in Nielsen ratings, ABC executives say.
在上个月，一家名为Nielsen的美国收视率掌控公司收购了一家名为Telephia的跟踪调查移动电话习惯用法的公司，其原因就在于此。
That is why Nielsen, an American firm that monitors television viewership, bought Telephia, a firm which tracks mobile-phone usage, last month
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