hard disk
硬盘 
　
例句：
One of the side-effects of using your PC regularly is: the more you work, the more the storage on your hard disk gets distributed across the surface.
经常使用你的个人计算机会带来另一个副作用，那就是，你做的工作越多，所占用的硬盘空间就越多。
 

sweat out
焦急等待
 
例句：
Frank was sweating out the results of his entrance examination.
弗兰克正在焦急等待着他的升学考试结果。

You are in Luck.
你的运气不错。 

对话：
A: Jack, I'm looking for a textbook on computers.
B: You are in luck. I've got two copies. I'd like you to have one.
A: Thank you. It's very kind of you.

A：杰克，我正在找一本关于计算机的教科书。
B：你的运气真不错。我这正好有两本，可以给你一本。
A：谢谢你。你真太好了。