When a country is ageing (median age above 40), it again has a high dependency ratio, this time because of old people.

而当一个国家趋向老迈时(中位年龄在40岁以上)，依赖性比例仍然高，这是因为老人多的原故。

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When fertility is high and a country is young (median age below 20), there are huge numbers of children and the overall dependency ratio is high.

一个国家生育率高，表示这个国家很年轻（中位年龄在20岁以下），小孩数量庞大，依赖性比例相当高；

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The ratio of Japanese aged over 65 to thoseof working age rose from 14% in 1980 to an estimated 34% in 2008. It is forecast to increaseto 49% by2020.

日本超过65岁的退休人员和工作人员的比例由1980年的14%上升到2008年的34%，预计到2020年达到49%。

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In France, for children under the age of four, the ratio is one to eight.

BBC: Ministers 'plan childcare change'

Accessible for free via iPhone and Android applications or the Web, SceneTap lets users view information on the number of people, male-female ratio, and average age breakdown of patrons in their favorite venues across their city.

ENGADGET: SceneTap app analyzes pubs and clubs in real-time, probably won't score you a Jersey Shore cameo

Chicago-based startup revolutionizes the way people go out at night by automatically tracking and revealing the number of people in a bar, the male-to-female ratio, and the average age of each customer, in real-time, with no need for user participation.

ENGADGET: SceneTap app analyzes pubs and clubs in real-time, probably won't score you a Jersey Shore cameo