在合适的点换行 - 在线编辑器

          <!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <style>
    p.test1 {
      width: 9em;
      border: 1px solid #000000;
      word-break: keep-all;
    }

    p.test2 {
      width: 9em;
      border: 1px solid #000000;
      word-break: break-all;
    }
  </style>
</head>
<body>

  <p class="test1"> This paragraph contains some text. This line will-break-at-hyphenates.</p>
  <p class="test2"> This paragraph contains some text: The lines will break at any character.</p>

  <p><b>注意:</b> word-break 属性不兼容 Opera.</p>

</body>
</html>
        