replacement index

简明释义

更新指数

英英释义

例句

1.To improve efficiency, the team analyzed the replacement index for outdated machinery.

为了提高效率，团队分析了过时机械的替换指数。

2.An increase in the replacement index may indicate that it's time to upgrade our systems.

在替换指数上升可能表明是时候升级我们的系统了。

3.By tracking the replacement index, we can forecast future expenses more accurately.

通过跟踪替换指数，我们可以更准确地预测未来的支出。

4.The company uses a replacement index to determine how many old products need to be replaced each year.

公司使用替换指数来确定每年需要更换多少旧产品。

5.The replacement index is crucial for managing inventory levels effectively.

对于有效管理库存水平，替换指数至关重要。

作文

In the realm of economics and demographic studies, the term replacement index is crucial for understanding population dynamics. The replacement index refers to the number of children that each woman must have in order to replace herself and her partner in the population. This concept is essential for analyzing whether a population is growing, stable, or declining. A replacement index of approximately 2.1 children per woman is generally considered necessary to maintain a stable population in developed countries, accounting for factors such as infant mortality and other demographics. When the replacement index falls below this level, it indicates that the population may eventually shrink unless there is an influx of immigrants or other factors that contribute to population growth. For example, many European countries are currently facing challenges related to low birth rates, where the replacement index hovers around or below the critical threshold. This situation raises concerns about the future workforce, economic stability, and social services. On the other hand, in many developing nations, the replacement index can be significantly higher than 2.1. While this might indicate a growing population, it also brings its own set of challenges, such as resource allocation, education, and healthcare. High birth rates can strain a country’s infrastructure and economy, leading to issues like poverty and unemployment. Therefore, understanding the replacement index allows policymakers to devise strategies that address both the immediate and long-term needs of their populations. Moreover, the replacement index is not only a matter of numbers; it reflects cultural, social, and economic factors that influence family planning and reproductive health. In societies where women have access to education and career opportunities, the replacement index tends to stabilize at a lower rate. Conversely, in cultures where traditional roles prevail and family size is prioritized, the replacement index may remain high. In conclusion, the replacement index serves as a vital indicator for understanding demographic trends and their implications on society. It plays a significant role in shaping policies that affect everything from immigration to healthcare to education. By monitoring and analyzing the replacement index, governments and organizations can better prepare for the future and ensure sustainable development for their populations.

在经济学和人口研究领域，术语replacement index对于理解人口动态至关重要。replacement index指的是每位女性必须生育的孩子数量，以便在种群中替代自己和伴侣。这个概念对于分析一个人口是增长、稳定还是下降至关重要。一般认为，发达国家需要约2.1个孩子的replacement index来维持稳定的人口，这考虑到了婴儿死亡率和其他人口统计因素。当replacement index低于这个水平时，这表明人口可能会逐渐减少，除非有移民涌入或其他因素促进人口增长。例如，许多欧洲国家目前面临着与低出生率相关的挑战，其replacement index徘徊在临界阈值附近或以下。这种情况引发了对未来劳动力、经济稳定性和社会服务的担忧。另一方面，在许多发展中国家，replacement index可能远高于2.1。虽然这可能表明人口在增长，但也带来了自身的一系列挑战，如资源分配、教育和医疗保健。高出生率可能会给一个国家的基础设施和经济带来压力，导致贫困和失业等问题。因此，理解replacement index使政策制定者能够制定应对其人口的即时和长期需求的策略。此外，replacement index不仅仅是数字问题；它反映了影响计划生育和生殖健康的文化、社会和经济因素。在女性获得教育和职业机会的社会中，replacement index往往会稳定在较低的水平。相反，在重视传统角色和家庭规模的文化中，replacement index可能保持在较高水平。总之，replacement index作为理解人口趋势及其对社会影响的重要指标，发挥着重要作用。它在塑造影响从移民到医疗保健再到教育的政策方面具有重要意义。通过监测和分析replacement index，政府和组织可以更好地为未来做好准备，确保其人口的可持续发展。