Creating Cool Web Sites with HTML, XHTML, and CSS《Firefox中解析CSS》

.special b { color: green; font-size: 125%; }

b i { background-color: yellow; }

bi { font-weight: bold; color: blue; }

This is a special block and bold words should appear

differently than they do in regular text.

And this by contrast is regular bold text

with a little italics tossed in for luck

and an example of italics within bold.

最后运行结果跟书中所讲述的不同哦

本书是在IE中运行，难道是浏览器兼容性问题，这个可再简单不过的