很遺憾，CSS目前不支持四周環繞，只支持左環繞或者右環繞。

<!doctype?html>
<style>
	.container{width:?300px;text-indent:2em;word-break:break-all;}
	.container:before{
	????content:?'.';
	????text-indent:?-99px;
	????overflow:hidden;
	????width:?1px;
	????margin-left:?-1px;
	????display:?block;
	????float:?left;
	????line-height:?2.5;
	}
	.img{width:50px;?height:50px;float:left;clear:both;margin:.5em;}
</style>
<div?class="container">
	<img?class="img">?
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</div>