这个短语可以说成是"to deteriorate" 或 "to get worse"。
来源：这个短语源自英语中"deteriorate"这个动词，意思是"变坏，恶化"。
例句：
The quapty of the food in this restaurant has deteriorated over the years. (这家餐厅的食物质量这些年来变得越来越差。)
The economy has been deteriorating for the past few months. (这个经济过去几个月一直在恶化。)
His health has been deteriorating since he retired. (他退休后的健康状况一直在恶化。)