This means that each agegroup is smaller than the one older than it - a trend that has proved hard to reverse in other societies.
这意味着每一个年龄层的人口都比其上一个年龄层的人口少——这种趋势在其他社会已经证明是不可逆的。
2
Millions of the healthy young and middle aged seldom see a doctor, so this can only mean that many, especially in the olderagegroup, 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。
3
The task force didn't take a position on aspirin for people who are 80 and older because of a lack of data in this agegroup.