英语词汇age of ratio怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

网络释义

1
?母子同位素比率
... 母子同位素比率 age of ratio 爬行动物时代〔T-K〕 age of reptiles 沈积物年龄 age of sediment ...

短语

1
age-ratio of networks
管网水龄比
2
ratio of age
年龄比例

双语例句

1
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。
2
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；
3
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%。

单词	age of ratio
释义	age of ratio 简明释义母子同位素比率网络释义 1 ?母子同位素比率 ... 母子同位素比率 age of ratio 爬行动物时代〔T-K〕 age of reptiles 沈积物年龄 age of sediment ... 短语 1 age-ratio of networks 管网水龄比 2 ratio of age 年龄比例双语例句 1 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。 2 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； 3 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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