In simple terms, the young and middle-aged save for old age by buying assets, often with borrowed money; the old sell them to pay for retirement.
简单的说，年轻人和中年人购买资产为了老了以后的日子，此过程常常涉及贷款；而老人则常常出售资产用来支付退休后的开销。
Millions of the healthy young and middle aged seldom see a doctor, so this can only mean that many, especially in the older age group, must currently be taking a fistful of drugs every day.
由于健康的年轻人和中年人很少看医生，所以这只能意味着，尤其是很多老年人，目前每天都在大把大把吃药。
Alcohol use starts at a young age: 14% of adolescent girls and 18% of boys aged 13-15 years in low - and middle-income countries are reported to use alcohol.
饮酒在年轻时开始：据报道，在中低收入国家，13 - 15岁的年轻人中，14%的少女和18%的男孩饮酒。
The volunteers made up three age groups: young people in their twenties, middle-aged people in their forties, and older people in their sixties.
自愿者分为三个年龄组：20多岁的年轻人群，40多岁的中年人群和60多岁的老年人。
Objective: To investigate the changes of hemorheology for old and middle-young-aged persons who were in different age phases.
目的：回顾探讨老年人的监测血液流变学指标变化与增龄的关系。
Objective: To investigate the changes of hemorheology for old and middle-young-aged persons who were in different age phases.
目的：回顾探讨老年人的监测血液流变学指标变化与增龄的关系。
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