如果在一个表格含有空单元格，那么你可以使用empty-cells属性来指定是否显示空单元格的边框
<!DOCTYPE html>
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<html>
<head>
<title>TODO supply a title</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<style type="text/css">
td {
border: 1px solid #0088dd;
padding: 15px;}
table.one {
empty-cells: show;}
table.two {
empty-cells: hide;}
</style>
</head>
<body>
<table class="one">
<tr>
<td>1</td>
<td>2</td>
</tr>
<tr>
<td>3</td>
<td></td>
</tr>
</table>
<table class="two">
<tr>
<td>1</td>
<td>2</td>
</tr>
<tr>
<td>3</td>
<td></td>
</tr>
</table>
</body>
</html>