代码示例:(标识:css_table_align_center)
<!DOCTYPE html>
<html>
<head>
<style>
table, td, th {
  border: 1px solid black;
}

table {
  border-collapse: collapse;
  width: 100%;
}

td {
  text-align: center;
}
</style>
</head>
<body>

<h1>text-align 属性</h1>
<p>这个属性设置 th 或 td 中内容的水平对齐方式(左、右、或居中)。</p>

<table>
  <tr>
    <th>Firstname</th>
    <th>Lastname</th>
    <th>Savings</th>
  </tr>
  <tr>
    <td>Bill</td>
    <td>Gates</td>
    <td>$100</td>
  </tr>
  <tr>
    <td>Steve</td>
    <td>Jobs</td>
    <td>$150</td>
  </tr>
  <tr>
    <td>Elon</td>
    <td>Musk</td>
    <td>$300</td>
  </tr>
  <tr>
    <td>Mark</td>
    <td>Zuckerberg</td>
    <td>$250</td>
  </tr>
</table>

</body>
</html>
运行结果: