ameliorate

随着新政策的实施，村里的经济状况逐渐改善。

The economic conditions in the village started to ___ameliorate after the new policies were implemented.

物理治疗在六个月的疗程中帮助改善了患者的慢性背痛。

Physical therapy helped ___ameliorate the patient's chronic back pain over the course of six months.

安装了新的过滤系统以改善工厂下游的河水水质。

New filtration systems were installed to ___ameliorate the river water quality downstream from the factory.