Conditions for the poor in Los Angeles have not improved.

洛杉矶穷人的生活条件还未改善。

《柯林斯英汉双解大词典》

On average the quality of governance around the world has not improved much.

平均来看，世界各国的治理质量改进不大。

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One area in which they have not improved, though, is their power supply.

然而其供电系统一直都没怎么改善。

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"The security situation has not improved in the country over recent weeks,".

VOA: standard.2009.09.10

Mister Weindruch says not only is life extended in the monkeys that eat less, but their quality of life is also improved.

VOA: special.2009.09.01

She not only improved her own life, but that of other women in similar situations.

VOA: special.2010.03.28

Groups financed by Mr. Ivanishvili have been linked to rising violence, not improved political debate.

WSJ: Urmas Reinsalu: Georgian Democracy and Russian Meddling

Sadly, tobacco use in this age group has not improved over the last decade.

FORBES: Preventing Tobacco Use Among Youth and Young Adults | SurgeonGeneral.gov

Had the Lakers not improved with Phil, the blame would fall on the players.

FORBES: Mike D'Antoni's Selection as Lakers Coach an Unpopular But Correct Choice Under the Circumstances