critical load

简明释义

临界载荷

英英释义

例句

1.A failure to account for the critical load can lead to catastrophic results.

未能考虑临界负荷可能导致灾难性的后果。

2.Engineers must calculate the critical load to ensure the safety of the structure.

工程师必须计算临界负荷以确保结构的安全性。

3.The bridge was designed to withstand a maximum critical load of 100 tons.

这座桥的设计承受的最大临界负荷为100吨。

4.During the test, the team found that the critical load exceeded their expectations.

在测试过程中，团队发现临界负荷超出了他们的预期。

5.The critical load for this type of beam is determined by its material properties.

这种类型梁的临界负荷由其材料属性决定。

作文

In the field of environmental science, the term critical load refers to the maximum amount of a particular substance that an ecosystem can receive without suffering significant harmful effects. This concept is crucial for understanding how pollutants affect different ecosystems and for setting regulatory standards for emissions. For instance, when discussing air quality, the critical load of nitrogen deposition is a vital factor in determining the health of forests and lakes. If the nitrogen levels exceed this threshold, it can lead to problems such as eutrophication, which depletes oxygen in water bodies and harms aquatic life.The importance of critical load lies not only in its scientific implications but also in its policy relevance. Governments and environmental organizations use this concept to create guidelines that protect natural habitats and biodiversity. By establishing critical loads, they can identify safe limits for emissions from industrial activities, agriculture, and transportation. For example, if a region's critical load for sulfur dioxide is set at a certain level, industries must ensure their emissions do not surpass this limit to prevent acid rain, which can damage soil, water sources, and wildlife.Moreover, understanding critical load helps in assessing the cumulative impacts of multiple stressors on ecosystems. Many environments are subject to various pollutants simultaneously, and each may contribute to the overall burden on the ecosystem. Scientists can model these interactions to determine a combined critical load that takes into account multiple pollutants, providing a more comprehensive view of environmental health.One of the challenges in applying the critical load concept is the variability between different ecosystems. Each ecosystem has unique characteristics that influence its resilience and response to pollutants. For instance, a coastal wetland may have a different critical load for nutrients compared to a mountain lake due to variations in hydrology, species composition, and existing nutrient levels. Therefore, localized studies are essential to accurately define critical loads and implement effective management strategies.In conclusion, the concept of critical load serves as a fundamental tool for environmental protection. It guides policymakers in making informed decisions to safeguard ecosystems from pollution while balancing economic development. As we continue to face environmental challenges such as climate change and habitat degradation, understanding and applying the principles of critical load will be essential in our efforts to preserve the planet's ecological integrity for future generations.

在环境科学领域，术语critical load指的是一个生态系统可以接收的特定物质的最大量，而不遭受显著的有害影响。这个概念对于理解污染物如何影响不同生态系统以及为排放设定监管标准至关重要。例如，在讨论空气质量时，氮沉降的critical load是确定森林和湖泊健康的重要因素。如果氮水平超过这个阈值，就可能导致问题，如富营养化，这会耗尽水体中的氧气并危害水生生物。critical load的重要性不仅在于其科学意义，还在于其政策相关性。政府和环保组织利用这一概念来制定保护自然栖息地和生物多样性的指导方针。通过建立critical load，他们可以识别工业活动、农业和交通排放的安全限度。例如，如果某地区的二氧化硫critical load设定在某一水平，工业必须确保其排放不超过这一限度，以防止酸雨，这会损害土壤、水源和野生动物。此外，理解critical load有助于评估多种压力源对生态系统的累积影响。许多环境同时受到多种污染物的影响，每种污染物可能都会增加生态系统的整体负担。科学家可以对这些相互作用进行建模，以确定综合的critical load，考虑到多种污染物，从而提供对环境健康更全面的视角。应用critical load概念的一个挑战是不同生态系统之间的变异性。每个生态系统都有独特的特征，这些特征影响其抵御能力和对污染物的反应。例如，沿海湿地与山区湖泊在营养物质方面可能具有不同的critical load，这取决于水文、物种组成和现有营养水平的差异。因此，局部研究对于准确界定critical load和实施有效的管理策略至关重要。总之，critical load的概念作为环境保护的基本工具，指导政策制定者在平衡经济发展与保护生态系统免受污染的同时做出明智的决策。随着我们继续面临气候变化和栖息地退化等环境挑战，理解和应用critical load的原则将对我们未来几代人保护地球生态完整性至关重要。