拥有8000万美国用户的YouTube仍是视频站点的巨无霸，它也一直在推出技术创新，如高清视频和嵌入式字幕。
It's still the largest of all the video websites, with around 80 million U.S. visitors alone, and it has been pushing out great innovations like HD video and in-video captioning.
拥有8000万美国用户的YouTube仍是视频站点的巨无霸，它也一直在推出技术创新，如高清视频和嵌入式字幕。
It's still the largest of all the video websites, with around 80 million U.S. visitors alone, and it has been pushing out great innovations like HD video and in-video captioning.
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