榨菜指数 pickle index
榨菜指数，指的是从榨菜的销量能反映一个地方人口流动的趋势。
The pickle index shows that sales of the pickle have apparently slumped over recent years in China's industrial southern cities, while consumption has steadily increased in other regions, suggesting that migrant workers are returning to their home provinces.
榨菜指数显示，近年来中国南方工业城市的榨菜消费量明显下滑，而其他地区的消费量稳步上升，表明农民工正在回流。
Consumption patterns of the preserved vegetable, a staple dish of migrant workers, helped researchers track laborers’ movement within China.
榨菜是农民工常吃的一道菜。榨菜的消费模式有助于研究者跟踪农民工在中国境内的移动规律。
