There's been an improvement in his French.他的法语有进步了。

There is considerable room for improvement in state facilities for treating the mentally handicapped.用于治疗智障人士的州政设施还有相当大的改进余地。

The system we introduced last year has been a great improvement.我们去年引进的系统是极大的改进。

Improvements have now been made to the system.现已对该系统进行了改进。

the dramatic improvements in surgical techniques外科手术技术方面的巨大进步

The new Prime Minister is an improvement on his predecessor.新首相要比他的前任更强。

the need for improvements to the building整修这栋楼的必要

Crime prevention officers can suggest improvements to deter burglars.预防犯罪的官员可以提出修正建议以威慑窃贼。