exosphere

简明释义

英[ˈeksəʊsfɪə(r)]美[ˈeksoʊsfɪr]

n. 外层，外逸层，散逸层（行星大气层的最外层）

英英释义

单词用法

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反义词

例句

1.The air density in the exosphere is so low that atoms and molecules can escape from it into interplanetary space.

外逸层中空气的密度非常小，以致原子和分子都能逃逸到星际空间。

2.The WFC3 images do not show any evidence for a temporary exosphere resulting from the impacts.

但是，WFC3的图像显示，没有因撞击而产生的任何临时外逸物质的迹象。

3.Above the stratosphere, blue layers mark the upper atmosphere (including the mesosphere, thermosphere, ionosphere, and exosphere) as it gradually fades into the blackness of outer space.

在大气层上，蓝色的部分表示上层大气(包括中间层、热层、电离层、外逸层)，它们渐渐消逝到外空间的黑暗中。

4.The presence of the moon’s exosphere was confirmed by instruments on the Cassini probe which orbits Saturn and its moons.

围绕土星和它的卫星运行的卡西尼号探测器证实了卫星外逸层的存在。

5.The exosphere is the furthest out and the least studied part of the upper atmosphere.

外逸层是最远的，也是研究最少的大气的上层部分。

6.Ions and high frequency electromagnetic radiation from the sun are responsible for dislodging the atoms in the exosphere.

离子和来自太阳的高频电磁辐射负责松脱的散逸层中的原子。

7.Above the troposphere is the stratosphere, followed by the ionosphere and capped by the exosphere.

在对流层上是平流层，接着是电离层，最。

8.Last is the exosphere, which is the outermost layer of the atmosphere.

最后是散逸层，这是大气的最外层。

9.The exosphere is the outermost layer of Earth's atmosphere, where atmospheric particles are so sparse that they can travel hundreds of kilometers without colliding with one another.

外层大气 是地球大气的最外层，在那里，气体粒子稀疏到可以在几百公里内不相互碰撞。

10.Satellites orbiting Earth reside in the exosphere, as this region allows them to maintain their speed and altitude with minimal atmospheric drag.

围绕地球运行的卫星位于 外层大气 中，因为这个区域使它们能够以最小的空气阻力保持速度和高度。

11.The temperature in the exosphere can reach up to 2000 degrees Celsius, but it feels cold due to the low density of particles.

在 外层大气 中，温度可以达到2000摄氏度，但由于粒子密度低，感觉仍然很冷。

12.Understanding the dynamics of the exosphere is crucial for improving satellite communication systems.

理解 外层大气 的动态对于改善卫星通信系统至关重要。

13.The exosphere extends from about 600 kilometers above sea level to around 10,000 kilometers.

外层大气 从海平面上方约600公里延伸到大约10000公里。

作文

The universe is a vast and fascinating place, filled with mysteries that continue to intrigue scientists and astronomers alike. Among the many layers of our atmosphere, one of the most intriguing is the exosphere, which is the outermost layer of Earth's atmosphere. This region extends from about 600 kilometers above sea level to approximately 10,000 kilometers, where it gradually transitions into outer space. Understanding the exosphere is crucial for various fields, including space exploration, satellite technology, and climate science. In the exosphere, the air is extremely thin, and the molecules are so sparse that they can travel hundreds of kilometers without colliding with one another. This unique characteristic makes the exosphere a fascinating subject of study, as it behaves differently from the denser layers of the atmosphere below. For instance, while airplanes rely on the thicker layers of the atmosphere for lift and propulsion, satellites orbit within the exosphere, taking advantage of its low drag environment to maintain their trajectories. One of the most significant aspects of the exosphere is its role in protecting Earth from solar radiation. The exosphere acts as a shield against harmful solar winds and cosmic rays, which can have detrimental effects on both human health and technological systems. Scientists have discovered that when solar activity increases, such as during solar flares, the exosphere can expand, allowing more solar particles to penetrate the atmosphere. This phenomenon can disrupt satellite communications and navigation systems, making it essential for researchers to monitor solar activity closely. Moreover, the exosphere plays a vital role in the study of climate change and atmospheric science. Understanding how the upper layers of the atmosphere interact with the lower layers can provide valuable insights into global warming and its effects on weather patterns. As greenhouse gases accumulate in the lower atmosphere, they can influence the temperature and behavior of the exosphere, leading to changes in satellite orbits and potentially affecting space missions. In recent years, advancements in technology have allowed scientists to explore the exosphere more thoroughly than ever before. High-altitude balloons and specialized satellites equipped with advanced sensors are providing new data about this enigmatic layer. These studies not only enhance our understanding of the exosphere itself but also contribute to broader knowledge about the Earth's atmosphere and its interactions with space. Furthermore, the exosphere is often overlooked in discussions about climate and environmental science, yet it is an integral part of our planet's system. By studying this layer, researchers can gain insights into the long-term changes occurring in the atmosphere and their potential impacts on life on Earth. The delicate balance of gases in the exosphere influences everything from satellite operations to the transmission of radio waves, highlighting its importance in modern technology. In conclusion, the exosphere represents a critical frontier in our understanding of Earth's atmosphere and our place in the universe. As we continue to explore this outer layer, we unlock new knowledge that can help us protect our planet and advance our technological capabilities. The mysteries of the exosphere are far from solved, and ongoing research will undoubtedly reveal even more about its significance in the grand scheme of our atmosphere and beyond.

宇宙是一个广阔而迷人的地方，充满了持续吸引科学家和天文学家的神秘。在我们大气层的众多层次中，最引人入胜的之一就是外逸层，它是地球大气的最外层。这个区域从海平面以上约600公里延伸到大约10,000公里，在这里，它逐渐过渡到外层空间。理解外逸层对多个领域至关重要，包括太空探索、卫星技术和气候科学。 在外逸层中，空气极其稀薄，分子稀疏到可以在几百公里内不发生碰撞。这一独特特性使得外逸层成为研究的一个有趣主题，因为它的行为与下面更密集的大气层不同。例如，飞机依赖于较厚的大气层提供升力和推进，而卫星则在外逸层内轨道飞行，利用其低阻力环境来维持轨迹。 外逸层最重要的方面之一是它在保护地球免受太阳辐射方面的作用。外逸层充当了对抗有害太阳风和宇宙射线的屏障，这些射线可能对人类健康和技术系统产生不利影响。科学家发现，当太阳活动增加时，例如在太阳耀斑期间，外逸层可能会膨胀，从而允许更多的太阳粒子穿透大气层。这种现象可能会干扰卫星通信和导航系统，因此研究人员必须密切监测太阳活动。 此外，外逸层在气候变化和大气科学研究中发挥着至关重要的作用。了解大气的上层如何与下层相互作用，可以为全球变暖及其对天气模式的影响提供有价值的见解。随着温室气体在下层大气中积累，它们可能会影响外逸层的温度和行为，导致卫星轨道的变化，并可能影响太空任务。 近年来，科技的进步使科学家能够比以往任何时候都更彻底地探索外逸层。高空气球和配备先进传感器的专用卫星正在提供关于这一神秘层的新数据。这些研究不仅增强了我们对外逸层本身的理解，还为我们对地球大气及其与太空的相互作用的更广泛知识做出了贡献。 此外，外逸层在气候和环境科学讨论中常常被忽视，但它是我们星球系统不可或缺的一部分。通过研究这一层，研究人员可以获得关于大气中发生的长期变化及其对地球生命潜在影响的见解。外逸层中气体的微妙平衡影响着从卫星操作到无线电波传播的一切，突显了它在现代技术中的重要性。 总之，外逸层代表了我们对地球大气和我们在宇宙中位置理解的关键前沿。随着我们继续探索这一外层，我们解锁的新知识可以帮助我们保护我们的星球并推动我们的技术能力。外逸层的神秘远未解决，持续的研究无疑将揭示更多关于它在我们大气和更广泛的宇宙中重要性的内容。