lap,大腿，top,上面。引申词义笔记本电脑。

1. She used to work at her laptop until four in the morning.

她从前经常用手提电脑一直工作到凌晨4点。

2. The device plugs into one of the laptop's USB ports.

这个设备可以插入到笔记本电脑的一个通用串行总线接口。

3. Simply power up your laptop and continue work.

只需打开笔记本电脑继续工作即可。

4. It is significantly more compact than any comparable laptop, with no loss in functionality.

它比同类笔记本电脑小巧很多，但功能未减。

5. A laptop would be really useful for when I'm working on the train.

我在火车上工作时,便携式电脑真的很有用.