动画迭代计数是您正在寻找的.
animation-iteration-count: infinite;
-moz-animation-iteration-count: infinite;
-webkit-animation-iteration-count: infinite;
-o-animation-iteration-count: infinite;
Run Code Online (Sandbox Code Playgroud)
更新小提琴:http://jsfiddle.net/HRP4n/1/