precessional

简明释义

英[/prɪˈsɛʃənl/]美[/prɪˈsɛʃənl/]

adj. 岁差的；因岁差而导致的

英英释义

单词用法

同义词

反义词

例句

1.This criterion is reasonable because it is not expressed in terms of the precessional velocity, but the angular velocity of the permanent rotation.

该判据用永久转动角速度的大小而不是进动角速度的大小作为判别准则，较为合理。

2.This criterion is reasonable because it is not expressed in terms of the precessional velocity, but the angular velocity of the permanent rotation.

该判据用永久转动角速度的大小而不是进动角速度的大小作为判别准则，较为合理。

3.The precessional 岁差的 motion of the gyroscope is essential for maintaining stability in aircraft.

陀螺仪的岁差的运动对于维持飞机的稳定性至关重要。

4.Understanding the precessional 岁差的 effects can help improve satellite positioning systems.

理解岁差的效应可以帮助改善卫星定位系统。

5.The precessional 岁差的 cycle of the equinoxes is crucial for navigation and timekeeping.

春分的岁差的周期对导航和计时至关重要。

6.Astronomers study the precessional 岁差的 motion of celestial bodies to understand their long-term behavior.

天文学家研究天体的岁差的运动，以了解它们的长期行为。

7.The Earth's axial tilt causes a slow precessional 岁差的 movement that affects the positioning of stars over millennia.

地球的轴倾斜导致缓慢的岁差的运动，这影响了星星在千年间的位置。

作文

The universe is a vast and intricate system, where celestial bodies move in a dance governed by the laws of physics. One fascinating aspect of this cosmic ballet is the concept of precessional motion. This term refers to the gradual shift in the orientation of an astronomical body's rotational axis. To understand precessional motion, we can look at the example of the Earth. Our planet does not simply spin on its axis; instead, it experiences a slow wobble over time. This wobble, known as axial precession, results in a change in the position of the celestial poles and the equinoxes. The cycle takes approximately 26,000 years to complete, meaning that the North Star we see today will not always be Polaris. As the Earth's axis shifts, different stars will take its place in guiding travelers and astronomers.The implications of precessional motion extend beyond mere astronomy. It affects our understanding of time, seasons, and even climate patterns. For example, the shifting of the equinoxes can lead to variations in the timing of seasons, which has been observed over millennia. Ancient civilizations were keenly aware of these changes, often aligning their calendars with celestial events. The Mayans, for instance, developed intricate systems to track the movements of the stars and planets, allowing them to predict agricultural cycles based on precessional changes.In addition to its historical significance, precessional motion has modern-day implications as well. Scientists study these motions to gain insights into climate change and environmental shifts. By analyzing how the Earth's tilt and orbit change over long periods, researchers can better understand past climates and make predictions about future trends. This knowledge is crucial for preparing for potential impacts on agriculture, water resources, and ecosystems.Moreover, precessional effects are not limited to Earth. Other celestial bodies, such as the planets in our solar system and distant stars, also exhibit precessional motion. For instance, the axial tilt of Mars undergoes precessional changes similar to those of Earth, which could have significant implications for its climate and potential habitability. Understanding these dynamics helps astronomers piece together the history of our solar system and the evolution of planetary environments.In conclusion, the concept of precessional motion is a powerful reminder of the interconnectedness of the universe. It highlights how even the smallest changes in the orientation of a planet can have far-reaching effects on time, seasons, and climate. As we continue to explore the cosmos, the study of precessional dynamics will undoubtedly play a crucial role in our understanding of both our own planet and the broader universe. Embracing this knowledge allows us to appreciate the complexity of the natural world and encourages us to protect our environment as we navigate the challenges of a changing climate.

宇宙是一个广阔而复杂的系统，天体在物理法则的支配下进行着舞蹈。这个宇宙芭蕾的一个迷人方面是岁差运动的概念。这个术语指的是天体旋转轴方向的逐渐变化。为了理解岁差运动，我们可以以地球为例。我们的星球并不仅仅是在其轴上旋转；相反，它随着时间的推移经历了一种缓慢的摇摆。这种摇摆被称为轴向岁差，导致天极和春分点的位置发生变化。这个周期大约需要26000年才能完成，这意味着我们今天看到的北极星并不总是北斗星。随着地球轴线的移动，不同的恒星将取代它在引导旅行者和天文学家中的位置。岁差运动的影响超越了单纯的天文学。它影响我们对时间、季节甚至气候模式的理解。例如，春分点的移动可能导致季节时间的变化，这在千年间被观察到。古代文明对这些变化非常敏感，常常将他们的日历与天文事件对齐。例如，玛雅人开发了复杂的系统来跟踪星星和行星的运动，使他们能够根据岁差变化预测农业周期。除了历史意义外，岁差运动在现代也有重要的影响。科学家研究这些运动，以获得对气候变化和环境变化的见解。通过分析地球倾斜和轨道在长时间内的变化，研究人员可以更好地理解过去的气候，并对未来趋势做出预测。这些知识对于准备应对农业、水资源和生态系统潜在影响至关重要。此外，岁差效应并不限于地球。其他天体，如我们太阳系中的行星和遥远的恒星，也表现出岁差运动。例如，火星的轴向倾斜经历了类似于地球的岁差变化，这可能对其气候和潜在的宜居性产生重大影响。理解这些动态有助于天文学家拼凑出我们太阳系的历史以及行星环境的演变。总之，岁差运动的概念强烈提醒我们宇宙的相互联系。它突显了即使是天体方向上最小的变化也可以对时间、季节和气候产生深远的影响。随着我们继续探索宇宙，岁差动态的研究无疑将在我们理解自己星球和更广泛宇宙中发挥关键作用。接受这一知识使我们能够欣赏自然界的复杂性，并鼓励我们在应对气候变化挑战时保护我们的环境。