Javascript 角度JS在无序列表中的2个数组中重复

我得到了这个html：

 <ul class="demo-list-three mdl-list">
    <li class="mdl-list__item mdl-list__item--three-line" ng-repeat="p in projects">
        <span class="mdl-list__item-primary-content">
            <i class="material-icons mdl-list__item-avatar">person</i>
            <span>{{p}}</span>
            <span class="mdl-list__item-text-body">
                {{descriptions[0]}}
            </span>
        </span>
        <span class="mdl-list__item-secondary-content">
            <a class="mdl-list__item-secondary-action" href="#"><i class="material-icons">star</i></a>
        </span>
    </li>
</ul>

人
{{p}
{{说明[0]}

项目和描述是控制器中的数组。现在，我为我的项目数组中的每个项目都获得了一个listitem，但是如何迭代描述呢

就像在第一次迭代中一样：

<span>{{descriptions[0]}}</span>

{{descriptions[0]}

在项目中下一个p的下一次迭代中：

<span>{{descriptions[1]}}</span>

{{说明[1]}

谢谢你

在ng重复中使用

<ul class="demo-list-three mdl-list">
    <li class="mdl-list__item mdl-list__item--three-line" ng-repeat="p in projects track by $index">
        <span class="mdl-list__item-primary-content">
            <i class="material-icons mdl-list__item-avatar">person</i>
            <span>{{p}}</span>
            <span class="mdl-list__item-text-body">
                {{descriptions[$index]}}
            </span>
        </span>
        <span class="mdl-list__item-secondary-content">
            <a class="mdl-list__item-secondary-action" href="#"><i class="material-icons">star</i></a>
        </span>
    </li>
</ul>

人
{{p}
{{descriptions[$index]}

在ng repeat中使用

<ul class="demo-list-three mdl-list">
    <li class="mdl-list__item mdl-list__item--three-line" ng-repeat="p in projects track by $index">
        <span class="mdl-list__item-primary-content">
            <i class="material-icons mdl-list__item-avatar">person</i>
            <span>{{p}}</span>
            <span class="mdl-list__item-text-body">
                {{descriptions[$index]}}
            </span>
        </span>
        <span class="mdl-list__item-secondary-content">
            <a class="mdl-list__item-secondary-action" href="#"><i class="material-icons">star</i></a>
        </span>
    </li>
</ul>

人
{{p}
{{descriptions[$index]}

如果你太快了，你得等5分钟；）你太快了，你得等5分钟；）