As people age, Starr says, muscle strength is key to helping them stay strong and continue living on their own in their own home.

斯塔尔说，随着人们年龄的增长，肌肉力量是帮助他们保持强壮和继续独立生活的关键。

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As people age, researcher Starr says muscle strength is key to helping them stay strong and continue living on their own in their own homes.

研究人员斯塔尔说，随着人们年龄的增长，肌肉力量是帮助他们保持强壮并继续在自己的家里独立生活的关键。

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Psychologists have long held that a person's character cannot undergo a transformation in any meaningful way and that the key traits of personality are determined at a very young age.

心理学家长期以来一直认为，一个人的性格不可能以任何有意义的方式发生转变，性格的关键特征在很小的时候就已经决定了。

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However, this was suggested to be the result of the fact that so many in the key age groups carry the infection that in some countries, the "pool" of people at risk of infection is falling.

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Good acidity is the key to balance and age-worthiness.

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With the collapse of the Soviet empire and the dissolution of western Europe's empires, one key aspect of the age of empire the struggle for world domination among great powers was over.

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