HTML 缩写 <abbr> 和 <acronym> 移入显示
<acronym title="World Wide Web">WWW</acronym>
<abbr title="World Health Organization">WHO</abbr>
<div title="123232323">WHO2</div>
<acronym title="World Wide Web">WWW</acronym>
<abbr title="World Health Organization">WHO</abbr>
<div title="123232323">WHO2</div>