我正在学习Bootstrap，我似乎被最基本的东西之一--列的垂直对齐所困住了.我试图让自己的内容与最高层保持一致，但失败得很惨.
我重写了我的代码多次，但没有结果.我只用Bootstrap文档中的代码开始了一个新的html文档，但所有内容仍然与文档的顶部对齐.我错过了什么吗？
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.0/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-gH2yIJqKdNHPEq0n4Mqa/HGKIhSkIHeL5AyhkYV8i59U5AR6csBvApHHNl/vI1Bx" crossorigin="anonymous">
<title>Document</title>
</head>
<body>
<div class="container text-center">
<div class="row align-items-end">
<div class="col">
should be bottom - One of three columns
</div>
<div class="col">
One of three columns
</div>
<div class="col">
One of three columns
</div>
</div>
</div>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.2.0/dist/js/bootstrap.bundle.min.js" integrity="sha384-A3rJD856KowSb7dwlZdYEkO39Gagi7vIsF0jrRAoQmDKKtQBHUuLZ9AsSv4jD4Xa" crossorigin="anonymous"></script>
</body>
</html>