A declining population can put a country under immense strain.

人口减少会让一个国家承受重压。

Conservation experts say that jaguar populations are declining across their range from Mexico to Argentina.

保护专家表示，墨西哥到阿根廷的境内，美洲豹的数量在不断减少。

In some countries they are now struggling with a declining population. They have no labor force.

在一些国家，他们现在正在和人口下降作斗争。他们没有劳动力。”

He told us of his organization's relief when Germany finally announced a study on the declining bee population.

他告诉我们，当德国最终宣布一项关于蜜蜂数量下降的研究时，他的组织松了一口气。

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。

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。

The study by the University of Washington concludes that most countries in the world will have declining populations by the year 2100.

华盛顿大学的研究得出结论，到2100年，世界上大多数国家的人口将会下降。

On the other hand, the lecturer believes that the uneven pattern of declining sea otter populations corresponds to the prevalence of orcas in different areas.

另一方面，演讲者认为水獭数量减少不均与虎鲸在不同区域的分布相一致。

Many Japanese also do not support mass immigration, which other countries have used to make up for, or balance, the effects of a declining and aging population.

很多日本人反对大规模移民，而其它国家都借此弥补或平衡人口下降或老龄化的影响。

And so, therefore has an overall declining and a declining working-age population.

因此，因此总体下降和工作年龄人口下降。

Apart from increased pressure on public spending as demand for healthcare systems and pensions rise, a declining youth population also leads to labour shortages that impact the economy.

随着人们对医疗系统和养老金的需求增大，公共支出面临的压力与日俱增，除此之外，青年人口减少还会导致劳动力短缺，从而对经济产生影响。

48. What will happen if the populations of top predators in a food web greatly decline?

48. 如果食物网中顶级捕食者的数量大幅减少，会发生什么情况？

The passage states that pollution was the cause of the declining population of sea otters, while the lecture states that predation is the most likely cause of the decrease in sea otter populations.

文章说污染是导致海獭数量减少的原因，而演讲则指出捕食是海獭数量减少的最可能的原因。

If, for example, we pass from a period of increasing population into one of declining population, the characteristic phase of the cycle will be lengthened.

例如，如果我们从人口增长时期过渡到人口下降时期， 则周期的特征阶段将会延长。

So there is a road map for us to untangle ourselves from this dilemma of geopolitical fragmentation, a climate-stressed world, a declining population, youth that are insecure.

因此，我们有一张路线图可以让我们摆脱地缘政治分裂、气候压力大的世界、人口减少、年轻人缺乏安全感的困境。

" 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。”

The cost of raising a child in China is higher than in some developed Western countries, the institution said, adding the population of newborns in China declined for six consecutive years, from 2017 to 2022.

该机构称，中国的育儿成本高于某些西方发达国家的水平，并指出中国出生人口数量从 2017 年到 2022 年已连续下跌 6 年。