理解一句话【async javascript and xml `异步的JS` 的 `XML`】

<?xmI version="1.@" encoding="UTF-8"?>
<root>
<student>
   <name>张</name>
   <age>25</age>
   <score>
       <english>95</english>
   </score>
</student>
<student>
   <name>杨</name>
   <age>4</age>
</student>
<student>
   <name>杨</name>
   <age>38</age>
</student>
</root>

[
    {
        "name":"张三",
        "age":25,
        "score": {
            "english": 95
        }
    },
    {
        "name":"杨",
        "age":4,
    },
    {
        "name":"杨",
        "age":38,
    }
]