Php 来自引导的列表组自定义问题

我对网络编程非常陌生（一个晚上学习PHP和一些css方面的经验）。我的问题是在使用引导中的自定义内容列表组时，我得到以下结果：

使用此代码

Donec id elit非mi porta孕妇在eget metus。马塞纳斯是一个美丽的葡萄品种
Donec id elit非mi porta孕妇在eget metus。马塞纳斯是一个美丽的葡萄品种
Donec id elit非mi porta孕妇在eget metus。马塞纳斯是一个美丽的葡萄品种

试试这个：

<div class="container">
  <div class="list-group">
    <a href="#" class="list-group-item active">
      <h4 class="list-group-item-heading">Mr Gus</h4>
      <p class="list-group-item-text">I don't think we're alike at all, Mr. White. You're not a cautious man at all. Your partner was late. And he was high.</p>
    </a>
  </div>
  <div class="list-group">
    <a href="#" class="list-group-item active">
      <h4 class="list-group-item-heading">Mr Gus</h4>
      <p class="list-group-item-text">I don't think we're alike at all, Mr. White. You're not a cautious man at all. Your partner was late. And he was high.</p>
    </a>
  </div>
  <div class="list-group">
    <a href="#" class="list-group-item active">
      <h4 class="list-group-item-heading">Mr Gus</h4>
      <p class="list-group-item-text">I don't think we're alike at all, Mr. White. You're not a cautious man at all. Your partner was late. And he was high.</p>
    </a>
  </div>
</div>

请参阅：

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它仍然占据着所有空间：(