Showing raw html with ng directive

It seems the raw html with angular directive does not work as I expected. The directive was removed. Here is the example of my raw html (inside my body property of article object):

<img src="" class="full-image" ng-click="showImages(0)">

But when I rendered it in my page:

<p ng-bind-html='article.body'>

The ng-click directive will be removed, like this:

<img src="" class="full-image">

What’s wrong with it? What should I do? Thanks