1.Researchers looked at data on the health of 70,000 female nurses and 1,500 male military veterans.
veteran老兵
The veteran soldier has fought many memorable battles.
这个老兵参加过许多难忘的战斗 。
2.Our findings speak to the possibility that raising levels of optimism may promote longevity and healthy ageing.
longevity长寿
Human longevity runs in families
人类的长寿具有家族遗传性 。