如何在angularjs中创建子行？

<div ng-app="myApp" ng-controller="myCtrl">
  <table>
    <tr ng-repeat="item in items">
      <td>{{ item.name }}</td>
      <td>{{ item.age }}</td>
    </tr>
  </table>
</div>

<script>
  var app = angular.module('myApp', []);
  app.controller('myCtrl', function($scope) {
    $scope.items = [
      { name: 'John', age: 25 },
      { name: 'Jane', age: 30 },
      { name: 'Bob', age: 35 }
    ];
  });
</script>