cellspacing cellpadding
<table border="1" cellspacing="300" cellpadding="100">
<tr>
<th>Month</th>
<th>Savings</th>
</tr>
<tr>
<td>January</td>
<td>$100</td>
</tr>
</table>
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cellpadding是边框到内容的距离
cellspacing是最外边框到单元格的距离