Objective: To explore the difference of cognitive aging among successful aging, usual aging and mild cognitive impairment elderly, and its biological and psychological base.
目的：探索成功老龄、常态老龄及病理性老化三种认知老化进程的差异特点及其部分相关因素。
The univariate analysis between successful aging and usual aging shows that marriage, diet, somnus conduce to successful aging; smoke, HBP, diabetes, arthritis don't conduce to successful aging.
多因素分析表明婚姻、居住方式、素食饮食、锻炼、正常的睡眠可促进老龄化人群向成功老龄化转变，而吸烟、糖尿病及关节炎病史则无促进作用。
But now concerns over the safety of the aging fleet, added to the usual red ink, are bringing this chapter in aviation history to a close.
现如今考虑到年事已高的“飞行舰队”的安全性，再加上惯常的经济赤字，二者正在把航空史上协和飞机这一章带到尾声。
But now concerns over the safety of the aging fleet, added to the usual red ink, are bringing this chapter in aviation history to a close.
现如今考虑到年事已高的“飞行舰队”的安全性，再加上惯常的经济赤字，二者正在把航空史上协和飞机这一章带到尾声。
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