<table style="word-break: break-all; word-wrap: break-word;">
<tr>
<td>sdfssssssssfsffffffffffffffffffffffffffffffffffffffffffff sfsdfdsfsdf
</td></tr>
</table>
<tr>
<td>sdfssssssssfsffffffffffffffffffffffffffffffffffffffffffff sfsdfdsfsdf
</td></tr>
</table>
<td width="100">
<p>
sdfssssssssfsffffffffffffffffffffffffffffffffffffffffffff sfsdfdsfsdf
</p>
</td>
</tr>p标签天生就是为段落准备的。word-wrap属性只有ie支持。