2001年，第一个iPod公布的时候，它们并不能播放视频，没有podcast之类的功能，用户也不能从iTunes直接购买音乐。

Whenthe first iPods were released in 2001, they couldn’t play videos, therewas no such thing as a podcast and users couldn’t buy music throughiTunes.

youdao

我打开国际百家讲坛的网站，这家网站的视频库都是FLASH格式，但是天火并不能播放。

I loaded the TED Talks website, which is a gallery of Flash videos, and Skyfire didn't transcode the videos.

youdao

浏览器可能尝试依次播放每个源文件，因此，如果不能播放一个Og g视频，将尝试WebM视频，然后是MP 4视频。

A browser will make attempts to play each of the sources in order, so if it can't play an Ogg video, it will try the WebM video and then the MP4 video.

youdao