x
 
                                <!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>编程字典(CodingDict.com)</title>  
<style>
[title~=hello]
{
    color:blue;
} 
</style>
</head>
<body>
<h2>将适用:</h2>
<h1 title="hello world">Hello world</h1>
<p title="student hello">Hello CSS students!</p>
<hr>
<h2>将不适用:</h2>
<p title="student">Hi CSS students!</p>
</body>
</html>