Some five years ago, high school seniors in America generally spent more than six hours a day on electronic devices.
大约五年前，美国高三学生每天花在电子设备上的时间一般超过六小时。
Healthy seniors who underwent "mental training" to boost memory, reasoning and mental processing were still reaping the rewards five years later.
健康志愿者接受心智锻炼能够促进其记忆，推理和心智运算能力，这种效果五年后仍能使其获益。
Elders with sure intentions and goals were about half as likely as aimless seniors to die over the five-year follow-up.
在随后五年内，有确定计划和目标老人的死亡率只是无目标老人的一半。
Elders with sure intentions and goals were about half as likely as aimless seniors to die over the five-year follow-up.
在随后五年内，有确定计划和目标老人的死亡率只是无目标老人的一半。
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