Drug companies have spent billions of dollars searching for therapies to reverse or significantly slow Alzheimer's disease, but in vain.

医药公司已经花费数十亿美元以寻找能逆转或显著减缓阿尔茨海默病的治疗方法，但毫无结果。

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The yields continue to slow down or reverse.

产量在继续下降或逆转。

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That self-sufficiency cannot be taken for granted if yields continue to slow down or reverse.

如果产量继续下降或逆转，那么自给自足就不能被认为是想当然的。

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At present there is no available treatment that can reverse or even slow down this decline.

BBC: CJD treatment battle continues

We also found that the same program of comprehensive lifestyle changes can reverse type 2 diabetes and may slow, stop, or even reverse the progression of early-stage prostate cancer.

CNN: Change your lifestyle, reverse your diseases

In tests they were able to reverse the process to slow the cancer cell growth.

BBC: Enzyme switch may help 'slow cancer tumour growth'