population pyramid

简明释义

人口年龄金字塔

英英释义

例句

1.The government uses the population pyramid 人口金字塔 to plan for future infrastructure needs.

政府利用人口金字塔 人口金字塔来规划未来的基础设施需求。

2.Countries with a balanced population pyramid 人口金字塔 are often more stable economically.

拥有平衡的人口金字塔 人口金字塔的国家通常经济更稳定。

3.The city's population pyramid 人口金字塔 shows a high number of young people, indicating potential growth in the future.

这座城市的人口金字塔 人口金字塔显示出有大量年轻人，表明未来可能会增长。

4.A narrow base in the population pyramid 人口金字塔 suggests an aging population with fewer young people.

在人口金字塔 人口金字塔中，底部狭窄表明老龄化人口，年轻人较少。

5.By analyzing the population pyramid 人口金字塔, demographers can predict trends in education and healthcare needs.

通过分析人口金字塔 人口金字塔，人口统计学家可以预测教育和医疗需求的趋势。

作文

A population pyramid is a graphical representation that illustrates the distribution of various age groups in a population, typically displaying the data for males and females separately. Understanding a population pyramid is crucial for demographers, policymakers, and social scientists as it provides insights into the demographic structure of a society. The shape of the pyramid can indicate whether a population is growing, stable, or declining, which has significant implications for economic planning and resource allocation.In a typical population pyramid, the horizontal axis represents the population size, while the vertical axis denotes age groups, often divided into five-year intervals. The youngest age group is usually at the bottom, with the oldest at the top. A broad base indicates a high birth rate, suggesting a youthful population, while a narrower base points to lower birth rates and an aging population. For instance, many developing countries exhibit a triangular shape, indicating a high number of young people, while developed nations often have a more rectangular shape, reflecting lower birth rates and a higher proportion of older individuals.One notable example of a population pyramid is that of Nigeria. Its pyramid shape is wide at the base, showcasing a large youth population. This demographic trend presents both opportunities and challenges. On one hand, a youthful population can drive economic growth if adequately educated and employed. On the other hand, it can lead to increased unemployment and social unrest if the economy cannot absorb the growing workforce.Conversely, consider Japan's population pyramid, which has a top-heavy structure due to its aging population. This demographic scenario poses significant challenges, such as a shrinking workforce and increased healthcare costs. Policymakers in Japan are grappling with how to address these issues, including encouraging higher birth rates and immigration to bolster the workforce.The analysis of a population pyramid also reveals trends over time. By comparing pyramids from different years, researchers can observe shifts in birth and death rates, migration patterns, and changes in life expectancy. For example, a country that experiences a baby boom will show a noticeable bulge in the younger age groups of its population pyramid. Conversely, a country facing a health crisis may see a decline in certain age cohorts.In conclusion, a population pyramid serves as a vital tool for understanding the demographic dynamics of a population. By analyzing its shape and structure, we can gain valuable insights into the challenges and opportunities that lie ahead for different nations. As the global population continues to change, the importance of interpreting these pyramids will only grow, guiding effective policy decisions and strategic planning for the future. Therefore, mastering the concept of a population pyramid is essential for anyone interested in demographics, economics, or social sciences.

人口金字塔是一种图形表示，展示了一个人口中各年龄组的分布，通常分别显示男性和女性的数据。理解人口金字塔对于人口统计学家、政策制定者和社会科学家至关重要，因为它提供了对社会人口结构的洞察。金字塔的形状可以指示一个人口是增长、稳定还是下降，这对经济规划和资源分配有重要影响。在典型的人口金字塔中，水平轴代表人口规模，而垂直轴表示年龄组，通常按五年间隔划分。最年轻的年龄组通常位于底部，最老的在顶部。宽大的底部表示高出生率，暗示年轻人口众多，而较窄的底部则指向较低的出生率和老龄化人口。例如，许多发展中国家的金字塔形状呈三角形，表明年轻人数量众多，而发达国家通常呈矩形形状，反映出较低的出生率和较高比例的老年人。尼日利亚的人口金字塔是一个显著的例子。它的金字塔形状在底部宽阔，展示了大量的年轻人口。这种人口趋势既带来了机遇，也带来了挑战。一方面，年轻人口如果得到充分教育和就业，可以推动经济增长。另一方面，如果经济无法吸纳不断增长的劳动力，就可能导致失业增加和社会动荡。相反，考虑日本的人口金字塔，由于其老龄化人口，结构上较为上重。这种人口情况带来了重大挑战，例如劳动力缩减和医疗成本增加。日本的政策制定者正在努力应对这些问题，包括鼓励更高的出生率和移民，以增强劳动力。对人口金字塔的分析还揭示了随时间变化的趋势。通过比较不同年份的金字塔，研究人员可以观察出生率和死亡率、迁移模式以及预期寿命的变化。例如，经历婴儿潮的国家将在其人口金字塔的年轻年龄组中显示出明显的隆起。相反，面临健康危机的国家可能会看到某些年龄组的下降。总之，人口金字塔作为理解一个人口的动态变化的重要工具，通过分析其形状和结构，我们可以获得有价值的见解，了解不同国家面临的挑战和机遇。随着全球人口的持续变化，解读这些金字塔的重要性只会增加，为有效的政策决策和未来的战略规划提供指导。因此，掌握人口金字塔的概念对于任何对人口统计学、经济学或社会科学感兴趣的人来说都是必不可少的。