Bootstrap对齐标签和表单控件组

<!DOCTYPE html>
<html>
   <head>
      <title>Bootstrap Example</title>
      <link href = /bootstrap/css/bootstrap.min.css rel = stylesheet>
      <script src = /scripts/jquery.min.js></script>
      <script src = /bootstrap/js/bootstrap.min.js></script>
   </head>
   <body>
      <form class = form-horizontal role = form>
         <div class = form-group>
            <label class = sr-only for = name>Name</label>
            <input type = text class = form-control id = name placeholder = Enter Name>
         </div>
         <div class = form-group>
            <label class = sr-only for = name>Name</label>
            <input type = number class = form-control id = name placeholder = Enter Age>
         </div>
         <button type = submit class = btn btn-primary>Submit</button>
      </form>
   </body>
</html>

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