- upgrade
- 改善: improve; ameliorate; perfect ...
- 提高: raise; heighten; enhance; in ...
- 改善: improve; ameliorate; perfect; better; mend; modify; improvement; perfection; melioration 改善人民生活 make the people's life better; 改善工作条件 improve the working conditions; 改善经济环境 improve the economic environment; 两国关系已有所改善。 the relations between the two countries have shown some improvement
- 对设备采取改善措施以提高生产力: promote kaizen for equipment to improve productivity
- 提高教师社会地位,改善教师物质待遇: raise teachers social status and improve their material welfare; raise teachers’ social status and improve their material welfare
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