如何在angular js中显示嵌套的ng-repeat中的变量

<div ng-app="myApp" ng-controller="myController">
  <div ng-repeat="item in items">
    <h3>{{ item.category }}</h3>
    <ul>
      <li ng-repeat="subItem in item.subItems">{{ subItem.name }}</li>
    </ul>
  </div>
</div>

angular.module('myApp', [])
  .controller('myController', function($scope) {
    $scope.items = [
      {
        category: 'Category 1',
        subItems: [
          { name: 'SubItem 1' },
          { name: 'SubItem 2' },
          { name: 'SubItem 3' }
        ]
      },
      {
        category: 'Category 2',
        subItems: [
          { name: 'SubItem 4' },
          { name: 'SubItem 5' }
        ]
      }
    ];
  });