td自动换行

<table style="TABLE-LAYOUT: fixed" border="1" cellspacing="0" cellpadding="0" width="200">
<tbody>
<tr>
<td style="WORD-WRAP: break-word" width="20">sssssssssssssssssssssssssssssssssssssssssssssss </td>
<td>aaaaa</td>
</tr>
<tr>
<td style="WORD-WRAP: break-word" width="20">sssssssssssssssssssssssssssssssssssssssssssssss </td>
<td>aaaaa</td>
</tr>
</tbody>
</table>