那位大神能教我这个里面的代码如何看不？

<form>
 <label for="male">男</label>
 <input type="radio" name="gender" id="male" />
 <br />
 <label for="female">女</label>
 <input type="radio" name="gender" id="female" />
 <label for="email">输入你的邮箱地址</label>
 <input type="email" id="email" placeholder="Enter email">
</form>