improve的名词形式
improvement
n.改善;改进;改进处;改善的事物
复数： improvements
Compact discs have brought about a vast improvement in recorded sound quality.
激光唱片极大地提高了录音的音质。
On several occasions she had remarked on the boy\'s improvement
她好几次提及这个男孩的进步。
He sees no signs of improvement in the UK and continental economy.
他看不到英国与欧洲大陆经济好转的迹象。
There has already been a definite improvement
已经有了显著的改进。
