Loss of memory and other brain function can start as early as age 45, posing a big challenge to scientists looking for new ways to stave off dementia, researchers said, Reuters reported.

路透社报道，研究人员表示，记忆力及其它大脑功能最早从45岁便开始衰退了，这给寻找痴呆治疗法的科学家提出了新的难题。

A research team followed more than 7,000 British government workers over a period of 10 years. Participants were assessed three times during the study, using tests for memory, vocabulary, and aural and visual comprehension skills.

在过去10年中，一组科研人员跟踪观察了七千多名英国政府工作人员。期间，研究人员用记忆力、词汇、视听领悟力测试对参与人员进行了3次评估。

Over the 10-year period, there was a 3.6 percent decline in mental reasoning in both men and women aged 45-49 at the start of the study, while the decline for men aged 65-70 was 9.6 percent and 7.4 percent for women.

10年中，研究刚开始时，45至49岁男女的智力推理能力下降了3.6%，而65至70岁男子的能力下降9.6%，该年龄段女子的能力下降了7.4%。

Since the youngest individuals at the start of the study were 45, it is possible that the decline in cognition might have commenced even earlier.

由于研究开始时最年轻的个人为45岁，思维能力开始衰退的时间可能更早。

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