ext4.0 中 如何把grid 列中的 sortAscending 修改为中文的

Question

ext4.0 中 如何把grid 列中的 sortAscending 修改为中文的 grid = Ext.create('Ext.grid.Panel', {
                store: store,
                columnLines: true,
                id:'maingrid',
                columns: cm,
                height: 450,
                width: "100%",
                title: '客户服务',
                renderTo: 'serviceGrid',                bbar: new Ext.PagingToolbar({
                    store: store,
                    pageSize: pageSize,
                    //显示右下角信息
                    displayInfo: true,
                    displayMsg: '当前记录 {0} -- {1} 条 共 {2} 条记录',
                    emptyMsg: "No results to display",
                    prevText: "上一页",
                    nextText: "下一页",
                    refreshText: "刷新",
                    lastText: "最后页",
                    firstText: "第一页",
                    beforePageText: "当前页",
                    afterPageText: "共{0}页"                }),
                viewConfig:
                {
                    stripeRows: true,
                    sortDescText:'降序',
                    forceFit: true                }
            });失效