1/ Create a clone of Static text web part
2/ Add new 2 fields RightContent(Data type: long text, Editor: CKEditor), LeftContent (Data type: long text, Editor: CKEditor)
3/ Create a web part container
<div class='container'>
<div class='row'>
<div class='col-sm-6'>
{% RightContent %}
</div>
<div class='col-sm-6'>
{% LeftContent %}
</div>
<!--Webpart-->
</div>
</div>
Finally, I add a widget into Content property by using Editor
That's all.