IE4 introduced a blazing fast (at the time) rendering engine as an embeddable component that could be used in other applications-this was a lot more important than people realize.

IE4推出了运行速度极快的(在当时)称为嵌入式组件的渲染引擎，它可以在其他应用中使用，这要比人们所认识到更重要。