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。

The study noted the global trend of population decline.

这项研究指出了全球人口下降的趋势。

And more than 50 countries are already in population decline.

超过50个国家的人口已处于减少趋势。

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。

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

其他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。

This population decline is a trend for the island nation that experts are worried about.

这个岛国的人口下降趋势令专家担忧。

Second, although bears damage some trees, there are not the cause of the overall population decline.

第二，虽然熊破坏一些树木，但是他们却不是整个黄杉种群数量下降的原因。

Scientists are also concerned because the rate of population decline has sped up in recent years.

科学家们还担心，因为近年来数量下降的速度加快了。

And now, we're seeing such a huge population decline, that we're now within estimates of 80,000 to 300,000.

而现在，我们看到其数量如此大幅度地下降，现在估计只有8万到30万只之间。

Even now, we're seeing a declining population of reds, yellows and blues, and an increasing community of oranges, purples and greens.

即使是现在，我们已经看到红色、黄色、蓝色数量在减少，而橘色、紫色、绿色的群体在增加。

It was labeled the most dramatic population decline of any bird in the Americas.

它被认为是美洲鸟类中数量下降最为显著的。

But also that scale is shrinking as migratory bird populations decline to record low numbers.

但随着候鸟数量下降至历史新低，这一规模也在缩小。

Now even the project's greatest cheerleaders talk of a continent facing a " Bermuda triangle" of debt, population decline, and lower growth.

如今，即使是最热衷欧盟事业的人也在谈论欧洲所面临的百慕大三角问题，这三大问题是：债台高筑、人口下降和经济增长放缓。

After decades of population decline, political bungling and corruption, Detroit, once America's third-largest city, now needs an emergency manager to save it.

数十年里，人口数量减少，政府管理不善和腐败问题使得底特律这个原本排名全国第三的城市急需一个专业经理人救它于水火之中。

There was no such rebound for snow crab, however, and the Alaska Department of Fish and Game announced Friday that fishery will remain closed amid population declines.

然而，雪蟹的数量却没有这样剧烈的回升，阿拉斯加渔猎部周五宣布，由于雪蟹数量下降，渔业将继续暂停。

" That's a pretty big thing; most of the world is transitioning into natural population decline, " researcher Prof Christopher Murray told the BBC.

“这是一件相当大的事情；世界上大部分地区正在过渡到自然人口下降，”研究员克里斯托弗默里教授告诉 BBC。

And you may be surprised to hear that this rapid population decline may lead to some dire consequences for most other life on Earth, including you.

您可能会惊讶地发现，人口的迅速减少可能会给地球上的大多数其他生命（包括您）带来一些可怕的后果。

In the two-year timeframe between April of 2020 right after the pandemic gripped the country to July of 2022, the California state population declined by an estimated 500,000 people.

从 2020 年 4 月疫情刚刚席卷全国到 2022 年 7 月的两年时间里，加州人口估计减少了 50 万人。

The conservation charity WWF has called on Mexico to ban fishing in the habitat of the world's most threatened marine mammal after it's population declined by 40% over the past year.

去年一年，小头鼠海豚数量锐减40%，生存环境面临威胁，保护组织“世界自然基金会”呼吁墨西哥禁捕。

" Livestock losses can be crippling to some of these farmers, and their subsequent retaliatory killing of predators in response to that is a major cause of population decline in large carnivores."

“家畜减少可能会严重伤害到其中一些农场主，而他们后续报复性杀害捕食者，这种反应是导致大型食肉动物数量降低的主要原因。”