从心理上说，老年时期要防止两种危险。
Psychologically there are two dangers to be guarded against in old age.
芭芭拉·斯特·拉赫几年前开始进入老年时期。
Barbara Strauch started having senior moments a few years ago.
负重运动能够使骨骼强壮，在老年时期就不会为人体自身机制所折磨。
Weight-bearing exercise helps keep bones strong and less likely to fall prey to the body’s own mechanisms in later age.
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