如何让 Echarts 双轴同时显示标签？

option = {  xAxis: [    {      type: 'category',      data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']    },    {      type: 'category',      data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']    }  ],  yAxis: [    {      type: 'value',      inverse: true    },    {      type: 'value'    }  ],  series: [    {      data: [120, 120, 10, 80, 70, 70, 130],      type: 'bar',    },    {      data: [10, 20, 110, 50, 30, 20, 80],      type: 'bar',      xAxisIndex: 1,      yAxisIndex: 1    }  ]};