为什么使用ng-repeat出来的不能排序

[yanruoxinb]

  <table data-sortable class="tableMax table-striped sortable-theme-bootstrap"  style="margin-top: 
           30px;" >
            <thead>
            <tr>
                <th>{{desc}}</th>
                <th ng-repeat="i in tableKeyList" >{{i.desc}}<span></span></th>
            </tr>
            </thead>

            <tbody>
            <tr ng-repeat="item in items|orderBy:col:desc">
                <td>{{item[dimension]}}</td>
                <td ng-repeat="i in tableKeyList">{{item[i.field]}}</td>
            </tr>
            </tbody>
        </table>

只能第一列排序，其它列不能排序啊