<div class="profile"> <h2>hello<br> <span>Welcome to my CV website</span> </h2> </div>加一段jQuary

Sure! Here's an example of adding a jQuery script to animate the "hello" text on hover:

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script>
$(document).ready(function() {
  $('.profile h2').hover(function() {
    $(this).find('span').addClass('animated');
  }, function() {
    $(this).find('span').removeClass('animated');
  });
});
</script>

Make sure to include the jQuery library in your HTML file before adding this script. Also, you can replace the "animated" class with any CSS class you want to apply the animation.