Could you please double space it so I can make corrections?

你能不能隔行打？这样我才好删改。

Twenty pages, that's not, is that double space or single space?

20页，你是用两倍行距还是单倍行距？

Please double space it and print it out on the laser printer so I can read it easily.

请隔行打，并且用激光打字机打出来，这样我看起来比较轻松。

But I just doubled my living space.

对于我来说 我的活动空间翻倍了。

Formerly there was a single space between the return address and the date, but some current styles allow double spaces.

以前，回信地址和日期之间只有一个空格，但当前的一些样式允许使用双空格。

The company's newest version of Word will put one of those blue squiggly lines, indicating you've made a mistake after each double space following a period.

该公司最新版的Word会将这些（格式）用蓝色波浪线标出，以示你在每个句号后都加两个空格是一个错误。