sediments

简明释义

英[ˈsɛdɪmənts]美[ˈsɛdɪmənts]

n. [地质]沉积物，[化学]沉淀物（sediment 的复数）

v. 沉积（sediment 的第三人称单数）

英英释义

单词用法

同义词

反义词

例句

1.The problem with ascribing all tillites to glaciation, however, is that tillite deposits are widespread in Precambrian sediments.

然而，使所有的黑土形成冰川作用的问题是，在前寒武纪沉积物中广泛分布有黑土。

2.Holocene sediments contain remnants of more recent plants and animals, so it's pretty easy to differentiate geologically between these two Epochs.

全新世的沉积物中含有较新的动植物遗迹，因此很容易从地质学上区分这两个时期。

3.She scooped out the yeasty sediments.

她将发酵的沉淀物舀了出来。

4.The fossils buried in Pleistocene and earlier ocean sediments were of foraminifera—small, single-celled marine organisms that secrete shells of calcium carbonate, or calcite.

在更新世和更早的海洋沉积物中埋藏的化石生物属于孔虫类生物，它们是微小的单细胞海洋生物，其分泌的硬壳由碳酸钙和方解石组成。

5.Lava injected into deep sea sediments is baking sediments and driving out greenhouse gases.

深海下的极热熔岩会把海底有机沉积物烤干同时释放出温室气体。

6.Scientists have dated sharp-edged flakes of stone found in the fine-grained sediments of a dry riverbed in the Afar region of Ethiopia to between 2.52 and 2.60 million years ago.

科学家们已经确定，在埃塞俄比亚阿法尔地区干燥河床的细颗粒沉积物中发现的具有锋利边缘的石片存在于252万至260万年前。

7.All that gas buoys up through the sediments and into the ocean, heating up the deep waters.

所有的这些气体穿过沉淀物浮向海洋，使深海海水温度升高。

8.Mangrove root systems have the ability to absorb and well trap sediments and pollutants in water that flows through them before they enter the ocean.

红树林根系有能力吸收并很好地截留水中的沉积物和污染物，这些沉积物和污染物在进入海洋之前流经这些根系。

9.The river carried away a lot of sediments 沉积物 after the heavy rain.

暴雨后，河流带走了很多沉积物。

10.Scientists study the sediments 沉积物 at the bottom of the ocean to understand past climates.

科学家研究海底的沉积物以了解过去的气候。

11.The lake's sediments 沉积物 provide valuable information about its ecological history.

湖泊的沉积物提供了关于其生态历史的宝贵信息。

12.During the excavation, archaeologists discovered layers of sediments 沉积物 that dated back thousands of years.

在挖掘过程中，考古学家发现了层层沉积物，这些沉积物可以追溯到几千年前。

13.The presence of certain sediments 沉积物 can indicate pollution in a body of water.

某些沉积物的存在可能表明水体中的污染。

作文

Sediments are an essential component of our planet's geological and ecological systems. They are formed through the weathering and erosion of rocks, which leads to the breakdown of materials into smaller particles. These particles are then transported by wind, water, or ice and eventually settle in various environments, such as rivers, lakes, and oceans. The study of sediments (沉积物) is crucial for understanding the history of the Earth and the processes that shape its surface. In many cases, sediments (沉积物) can provide valuable insights into past climates and environmental conditions. For example, scientists often analyze sediment cores taken from the ocean floor or lake beds to reconstruct historical climate data. By examining the composition and layering of sediments (沉积物), researchers can infer changes in temperature, precipitation, and even human activity over thousands of years. Moreover, sediments (沉积物) play a vital role in supporting aquatic ecosystems. They serve as habitats for various organisms, including bacteria, fungi, and invertebrates. These organisms contribute to nutrient cycling and help maintain the health of aquatic environments. Additionally, sediments (沉积物) can act as natural filters, trapping pollutants and improving water quality. However, human activities have significantly impacted the distribution and quality of sediments (沉积物). Urbanization, agriculture, and industrial processes can lead to increased sedimentation rates and the introduction of harmful substances into natural water bodies. This not only affects the organisms that rely on these sediments (沉积物) but also poses risks to human health and safety. To mitigate these effects, it is essential to implement effective land-use practices and conservation strategies. For instance, maintaining riparian buffers along waterways can help reduce soil erosion and filter runoff before it enters aquatic systems. Additionally, restoring wetlands can enhance the natural sedimentation process and improve water quality. In conclusion, sediments (沉积物) are more than just particles settling at the bottom of a body of water; they are integral to our understanding of Earth's history and the functioning of ecosystems. Protecting and managing sediments (沉积物) is crucial for preserving biodiversity and ensuring the sustainability of our natural resources. Through responsible stewardship, we can safeguard these invaluable components of our environment for future generations.

沉积物是我们星球地质和生态系统的重要组成部分。它们是通过岩石的风化和侵蚀形成的，这导致材料分解成更小的颗粒。这些颗粒随后通过风、水或冰的运输，最终在各种环境中沉积，如河流、湖泊和海洋。对沉积物的研究对于理解地球的历史和塑造其表面的过程至关重要。 在许多情况下，沉积物可以提供有关过去气候和环境条件的宝贵见解。例如，科学家经常分析从海底或湖床取出的沉积物柱，以重建历史气候数据。通过检查沉积物的组成和层次，研究人员可以推断出温度、降水量甚至人类活动的变化，时间跨度可达数千年。 此外，沉积物在支持水生生态系统中发挥着至关重要的作用。它们为各种生物提供栖息地，包括细菌、真菌和无脊椎动物。这些生物有助于养分循环，并帮助维持水生环境的健康。此外，沉积物还可以作为天然过滤器，捕获污染物并改善水质。 然而，人类活动对沉积物的分布和质量产生了显著影响。城市化、农业和工业过程可能导致沉积速率增加，以及有害物质进入自然水体。这不仅影响依赖这些沉积物的生物，还对人类健康和安全构成风险。 为了减轻这些影响，实施有效的土地使用实践和保护策略至关重要。例如，维护沿水道的滨水缓冲区可以帮助减少土壤侵蚀，并在径流进入水生系统之前进行过滤。此外，恢复湿地可以增强自然沉积过程，并改善水质。 总之，沉积物不仅仅是沉积在水体底部的颗粒；它们是我们理解地球历史和生态系统功能的重要组成部分。保护和管理沉积物对于维护生物多样性和确保自然资源的可持续性至关重要。通过负责任的管理，我们可以为未来几代人保护这些宝贵的环境组成部分。