请问怎么理解:background-image: -ms-radial-gradient(farthest-side ellipse at center, rgba(246,241,232,.85)
background-image: -ms-radial-gradient(farthest-side ellipse at center, rgba(246,241,232,.85) 39%,rgba(212,204,186,.5) 100%), url("http://fs0.139js.com/file/s_jpg_857b081bjw1du3kveu19sj.jpg");
不明白,怎么理解??谢谢!