它在青年时期达到顶峰，在一段时间内趋于平稳，然后普遍会开始随着年龄的增长而缓慢下降。
It peaks in young adulthood, levels out for a period of time, and then generally starts to slowly decline as we age.
也许最令人兴奋的是研究表明，像编织和钩编这样的手艺可能有助于防止因年龄增长而导致的大脑功能下降。
Perhaps most exciting is research that suggests that crafts like knitting and crocheting may help to keep off a decline in brain function with age.
尽管举办了这一庆祝活动，爵士乐在美国的听众人数仍在下降，听众的年龄也在上升，爵士乐不太受年轻人欢迎。
Despite the celebrations, though, in the U.S. the jazz audience continues to shrink and grow older, and the music has failed to connect with younger generations.
认知能力下降是指丧失学习新技能或回忆单词、名字和面孔的能力，这是随着年龄的增长而最常见的现象。
Cognitive decline is the loss of ability to learn new skills, or recall words, names, and faces that is most common as we age.
与此同时，每个年龄层的劳动参与率都在下降。
Meanwhile, labor participation fell for every other age group.
年龄再大，薪水就开始有所下降，这会因受教育的水平不同而差异。
At greater ages still, salaries started dropping, dependent on the level of education.
随着营养以及卫生保健的提高，青春期年龄也就随之下降。
As nutrition and health care improved, the age of puberty dropped.
坏消息是：我们大脑的记忆能力确实随我们的年龄而下降。
在不到20年的时间里，各个年龄组的出生率都下降了。
可以观察到这些下降，而与一般的健康因素诸如年龄、饮酒、吸烟等等的影响无关。
These reductions were seen independently from the effects of general health factors like age, drinking, smoking and so on.
我不确定他的速度是否不如以前快了，但我仍然相信他还是那么快，只是年龄大了持续快速的能力下降了。
I'm not sure he has lost pace. I still think he has that but what you lose with age is the capacity to repeat the pace.
他认为随着女性年龄逐渐变大，更经常的检测来监视其激素水平是否有所下降是必须的，绝经的迹象是即期发生的。
He thought it might be necessary to test women more often as they got older to monitor if hormone levels dropped off, an indication menopause was imminent.
结果表明，男童的青春期年龄在过去15年已经下降了三年半，再一次印证了对唱诗班男童的研究。
It showed that the age of puberty had dropped by three and a half months over 15 years, reinforcing the results of the choirboy study.
缺铁（贫血症）致使免疫力下降，在一些贫困国家，到达生育年龄的妇女中有一半都有缺铁性贫血。
Shortage of iron (anaemia) weakens the immune system and affects, in some poor countries, half of all women of child-bearing age.
当婴儿潮时代出生的人到达以存钱为主的年龄段时，比值急速下降，在2000年的网络狂潮中迎来低谷。
The ratio fell sharply as the baby boomers reached their prime saving years, hitting a low in 2000 at the time of dotcom mania.
在全世界大约11个受影响最严重的国家中，有8个国家在过去五年里15 -24岁年龄组中的艾滋病毒流行率得到下降。
In 8 out of 11 of some of the world's most affected countries, HIV prevalence in the age group 15 to 24 years has declined in the past five years.
该地区的劳动年龄人口数现在还在缓慢增长，预计下一个十年就将以每年0.3%的幅度下降。
Over the coming decade the region's working-age population, which until now has been rising slowly, will shrink by some 0.3% a year.
对日本经济增长前景最重要的影响因素是其工作年龄人口数量的下降。 工作年龄人口是指15~64岁间的人，自1996年以来一直在下降。
What matters most for Japan’s economic growth prospects is the decline in its working-age population, those aged 15-64, which has been shrinking since 1996.
近年来因新的“核心”资产发现率已下降，现有矿山中处于江河日下的中等年龄的比例一直在上扬。
The proportion of existing mines in flabby middle-age is growing as the rate of discovery of new tier-one assets has slowed over recent years.
随着人们对这种病症熟悉程度的增加，平均的诊出年龄由1992年出生组的5.9岁下降到2000年出生组的3.8岁。
As the disorder became increasingly well-known, the average age of autism diagnosis fell from 5.9 among those children born in 1992 to 3.8 for those born in 2000.
1987年以来中国的年龄调整残疾患病率总体已经下降，然而因残疾类别不同得出的结果也不一致。
In China, the age-adjusted prevalence of disability has declined since 1987, with inconsistencies dependent on the type of disability.
天主教会的人口统计资料十分有意思，二、三、四岁的孩子居多，年纪稍大一点的也不算多，年龄更大些孩子的数字更是直线下降。
The demographics of the congregation were interesting. There were a lot of children of two, three or four years old, a sprinkling of slightly older ones and then the figures fall off a cliff.
虽然财富下降可能推迟了老龄工作者的退休年龄，但是仅仅是增加了推迟退休的可能性。
But while diminished wealth may keep more of the elderly in the office, it merely enhances an underlying trend towards later retirement.
这样一项政策改变了年龄结构：年轻人的人口比例下降，而老年人的比例增长。
Such a policy distorts the age structure: the proportion of population in the younger age groups goes down and proportion of the elderly increases.
然而来自RAJAR（评级机构）出具的恩德斯调查报告显示，年龄段在15到24岁听众收听广播的平均时间比五年前下降了几乎20%。
Using data from RAJAR, a ratings agency, Enders Analysis calculates that the average 15- to 24-year-old radio listener tunes in for almost 20% fewer minutes now than five years ago.
在大部分国家，随着工人积累的经验越丰富，效率越来越高，工资也在上升，然后随着工人越来越接近退休年龄，他们的工资也再次下降。
In most countries, pay goes up as workers become more experienced and productive, and then declines again towards the end of their careers.
随着男性年龄增长，他们的睾酮水平可能稍微下降。
随着男性年龄增长，他们的睾酮水平可能稍微下降。
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