It's an abbreviation of 'web log'; a phrase that was first used in 1997, both as a noun and as a verb, a web log.

其实这个词是web log的缩写词；web blog这个短语首先是在1997年被使用的，兼为名词和动词，如：a web log（一篇网络日志）。

If you Google someone, you might find that person's name on a blog. A blog is the shortened name for a Web log.

如果你谷歌某个人，可能会找到这个人的名字出现在博客上。

Also, for the first time in history, troops on the front lines were able to provide direct reporting through Web logs, or blogs, they posted on the Internet.

此外，这是历史上第一次前线部队能够通过在互联网上发布的网络日志或博客提供直接报道。