Edit in JSFiddle

<div ng-app="myapp" ng-controller="mycontroller as ctrl">  
    <table>
        <tr ng-repeat-start="(key,value) in ctrl.school">
            <td>姓名：</td><td>{{ key }}</td>
        </tr>
        <tr ng-repeat-end><td>年齡：</td><td>{{ value.age }}</td></tr>                
    </table>      
</div>    

angular.module("myapp",[]).
controller("mycontroller",[function() {
    var self = this;
    self.school = {
        "john": {
            "age": 18,
            "weight": 50
        },
        "jack": {
            "age": 19,
            "weight": 53
        },
        "mary": {
            "age": 20,
            "weight": 43
        },
        "bill": {
            "age": 22,
            "weight": 55
        }        
    }
}]);