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。
As people age, Starr says, muscle strength is key to helping them stay strong and continue living on their own in their own home.
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。
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.
打乒乓球不仅需要强壮的臂力和腿部力量，还需要集中精力。
Tennis requires great strength in the arms and legs as well as strong concentration on the game.
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