通过将文字含在标签<b></b>之间，我们可以将这些文字显示为粗体。
<!DOCTYPE html>
<!--
To change this license header, choose License Headers in Project Properties.
To change this template file, choose Tools | Templates
and open the template in the editor.
-->
<html>
<head>
<title>TODO supply a title</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body>
<div>粗体</div>
<p>它可以在外观上将其中的文字以<b>粗体</b>的方式凸显出来</p>
<p>例如段落中的<b>关键字</b></p>
</body>
</html>