Li Hua: I have an MP4 player.

李华：我有一台MP4播放器。

The output file extension is MP4.

输出文件格式是MP4。

MP4 format is Apple's version of video encoding.

MP4格式是苹果公司的视频编码版本。

Examples:Mary requested an MP4 from her grandpa.

玛丽向她爷爷要了一个MP4。

Examples: Mary requested an MP4 from her grandpa.

玛丽向她爷爷要了一个MP4。

Li Lei finally spotted the MP4 player he wanted.

李雷最后找到了他想要的MP4。

[MP4](Philosophy of Love in the Western World) 2011-03-28

《麻省理工开放课程：西方世界的爱情哲学》[全4课

It is also widely used for charging of lithium battery of MP3/MP4/PDA/digital camera, etc.

该产品还广泛应用于：MP3/MP4/PDA/数码相机等锂电池产品的充电。

The main distinguishing feature of the IPOD MP4 is Touch System.

触控系统是IPOD MP4的主要特点。

McLaren kick off their three days with Gary Paffett and Pedro de la Rosa at the wheel of the MP4-21.

迈凯轮（迈凯轮新闻，迈凯轮说吧）车队派出加里-帕非特和佩德罗-德-拉-罗驾驶着MP4-21启动了为期三天的测试。