Edit in JSFiddle

var e1 = _.extend({name:'e1'}, Backbone.Events);
var e2 = _.extend({name:'e2'}, Backbone.Events);
//e1注册hello
e1.on('hello',function(){
    console.log('e1 say hello');
    });
//e2监听e1的hello事件
e2.listenTo(e1,'hello',function(){
    console.log('this is '+this.name+' listened!!!!');
    });
//触发e1的hello事件
e1.trigger('hello');