Which those groups had the biggest declines?

哪些群体的减少呢？

Then production and availability will begin to seriously decline.

然后产量和可获的数量将会开始急剧减少。

Many are aware that fertility declines as you age.

很人都意识到生育能力会随着龄的增长而下降。

The pandemic quickened enrollment declines in many districts.

疫情加速了许学区的入学人数下降速度。

The downside risk for a flipper is price declines.

一个炒房者的下行风险是价格下跌。

Over recent years they haven't yet declined.

近来也没有下降。

After two days of strong gains, stocks show modest declines.

经过两天的强势涨幅, 股市略显小幅颓势。

In Chicago, COVID-19 worsened enrollment declines that began before the virus.

在芝加哥，新冠疫情加剧了在病毒爆发前就已经开始的入学人数下降的问题。

The Dow Jones Industrial Average endured its eighth biggest point decline ever on Monday.

周一，道琼斯工业平均指数创下第八大单日大跌幅。

Knowledge is lost, living standards fall, violence increases and often the population declines.

知识丢失，生活水平下降，暴力增加，人口数常随着下降。

But he oversaw one of the most dramatic economic declines in the world.

统治期间发生了全球引人注目的经济衰退。

Meanwhile, eight cities reported month-on-month price declines, down from 15 in February.

与此同时，8个城市的房价月环比呈现下跌趋势，2月份减少15个。

That number has been declining steadily since the 1950s.

这个数量自从1950就开始下降。

Repeat testing helps scientists track any decline.

重复检测帮助科学家追踪任何指标的衰退情况。

Other animals that depend on humans, from rats to cockroaches, will suffer drastic population declines.

其依靠人类生存的动物，从老鼠到蟑螂，都将面临数量急剧下降的危险。

Illinois farmer Ron Kindred says even his soybeans aren't immune to coronavirus related price declines.

伊利诺伊州的农民罗恩·金德雷德说，即使是的大豆也不能幸免于与冠状病毒造成的价格下跌。

As China's farming population declines, agricultural modernization is needed to enhance productivity.

随着中国农业人口减少, 农业现代化就需要提高生产力。

They pose a threat because your repeat sales have been declining.

们对公司构成了威胁，因为你的重复销售律一直在下降。

But it isn't just the decline in bee numbers causing a problem.

蜜蜂数量减少会造成问题，不光如此。

Yemen, India, Syria, Botswana and Venezuela have experienced the largest declines.

也门、印度、叙利亚、博茨瓦纳和委内瑞拉则退步大。