dy id="variable">
            <tr>
                <th class="scene_desc" colspan="3">数据</th>
            </tr>
            <tr>
                <td class="symbol"><img src="variable_A.svg"/></td>
                <td>叠加的矩形的数量</td>
                <td class="code">A</td>
            </tr>
            </tbody>
        </table>
        <br/>
        <table class="items" cellspacing="0">
            <tbody id="formula">
            <tr>
                <th class="scene_desc" colspan="3">添�