表行不包含position：absolute的元素

I have a table like this:

我有这样一张桌子：

<table cellspacing="0">
    <tr>
        <td>Row 1</td>
        <td><button>Button 1</button></td>
    </tr>
    <tr>
        <td>Row 2</td>
        <td><button>Button 2</button></td>
    </tr>
    <tr>
        <td>Row 3</td>
        <td><button>Button 3</button></td>
    </tr>
</table>
<table