1. 定义：populations是population的复数形式，表示一定地区或国家内某一类生物的总体数量。

2. 种类：populations可以指不同动物、植物、微生物等的总体数量。

3. 作用：populations是生态学研究中的重要概念，可以帮助科学家了解一个生态系统的稳定性和可持续发展性。

4. 影响因素：populations的数量受到生物种群动态、环境变化等因素的影响。

例句：

1. The populations of prairie dogs in North America have declined in recent years due to habitat loss.

北美大草原犬鼠的种群数量由于失去栖息地而在最近几年内有所下降。

2. Human populations have increased dramatically in the past century, putting pressure on resources and the environment.

在过去的一个世纪中，人类种群数量大幅增长，给资源和环境带来了压力。

3. The populations of certain bird species have been negatively impacted by climate change and loss of habitat.

某些鸟类物种的种群数量受到气候变化和栖息地的丧失的负面影响。

4. Ecologists study the populations of different plant and animal species to better understand their interactions within an ecosystem.

生态学家研究不同植物和动物物种的种群，以更好地了解它们在生态系统内的相互作用。

5. The conservation of endangered species requires monitoring their populations and protecting their habitats.

保护濒危物种需要监测它们的种群并保护它们的栖息地。

翻译：populations 可以翻译为“人口”，也可以翻译为“种群”。

读音：[ppjlenz]

例句：

1. The populations of some endangered species are declining at an alarming rate.（某些濒危物种的种群正在以惊人的速度下降。）

2. The government is implementing policies to control the growth of populations.（正在实施控制城市人口增长的政策。）

3. The populations of some countries are aging rapidly, which poses a challenge to their economies.（某些国家的人口正在迅速老龄化，这给它们的经济带来了挑战。）

populations在英语中代表"天、人口"的意思，作为名词时有"的复数形式"的意思，在线发音：[ppj'lenz]，populations是一个英语名词，在《英汉新词词典》中，共找到31个与populations相关的句子。

Populations的中文翻译

1.天

例句:Healthy sub-populations of birds, increasing biodiversity generally. (健康的鸟类群体 一般说来提高了物种的多样性。)

2.人口

例句:Armenian and Turkic are spoken among the small Armenian and Turkoman populations. (亚美尼亚语和土耳其语在少数亚美尼亚人和土耳其人中使用。)

3.的复数形式

例句:But things don't just diffuse in human populations at random. (但是这些事物在人群中并非是随机传播的。)

4.农、的复数形式

例句:Genetic Structure and Intraspecific Genetic Polymorphisms in Natural Populations of Psathyrostachys huashanica (翻译:华山新麦草自然居群的遗传结构和种内遗传多态性研究)

用法及短语

populations一般作为名词使用，如在general populations(母体)、heterogeneous populations(非齐性总体)、Stellar populations(stellar population\n【天文学】星族)等常见短语中出现较多。

例句

1. But things don't just diffuse in human populations at random. (翻译:但是这些事物在人群中并非是随机传播的。)

2. Genetic Structure and Intraspecific Genetic Polymorphisms in Natural Populations of Psathyrostachys huashanica (翻译:华山新麦草自然居群的遗传结构和种内遗传多态性研究)

3. Lionfish populations have exploded in the past few years. (翻译:狮子鱼的数量在过去几年里激增。)

4. Vulnerable populations often reap the greatest benefits from CCTs. (翻译:通常，弱势群体从有条件现金援助项目获益最大。)

5. Genetic structure and differentiation of Psathyrostachys huashanica populations detected with RAPD markers (翻译:用RAPD检测华山新麦草自然居群的遗传结构和居群分化)

6. Healthy sub-populations of birds, increasing biodiversity generally. (翻译:健康的鸟类群体 一般说来提高了物种的多样性。)

7. Anatabine was significantly and positively correlated with anabasine in both populations. (翻译:新碱与假木贼碱在两个群体中均显著正相关。)

8. Countries with large populations, and hence large internal markets, tend togrow more rapidly than countries with small populations. (翻译:比起人口小国，拥有广阔国内市场的人口大国经济增长更为迅猛。)

9. We had no idea: Did they distinguish into different populations? (翻译:我们不知道它们是不是因为不同群类而有所不同 它们是亚群嘛？ )

10. Change has accelerated as human populations rose. (翻译:变化随着人类人口数量的增加而加快了速度。)

11. Lobster populations in the gulf of Maine and Georges Bank appear to be healthy. (翻译:在缅因州海湾和乔治海岸的龙虾数量看来还算正常。)

12. Some people worry that the real goal of family planning is to control populations. (翻译:有些人担心 计划生育的真正目的是 控制人口数量。)

13. Regardless of the taxonomic status of these populations, adaptive alleles may have introgressed from archaic populations into modern humans. (翻译:不论其分类地位的这些人口，自适应等位基因可能已经渗入从过时的人口融入现代人类。)

14. Firstly, our results indicated that the monomorphic populations of L. pinceana were originated from adjacent western dimorphic populations. (翻译:首先，研究结果表明滇丁香长花柱型单态居群起源于西部邻近的二态居群。)

15. Monoploid peaches have been obtained from seedling populations. (翻译:从实生群体里曾经得到过单倍体桃。)

近义词&反义词

populations作为名词的时候，其近义词以及反义词有0、population/1、s等。