epicycle

简明释义

英[ˌepɪˈsaɪkl]美[ˈepəˌsaɪkl]

n. [天] 本轮；[数] 周转圆

英英释义

单词用法

同义词

反义词

例句

1.The carbon cycle has thus acquired another epicycle, and become even more complicated to understand than it was.

碳循环因此又得纳入另一个亚循环，以致变得更加复杂难以理解。

2.The carbon cycle has thus acquired another epicycle, and become even more complicated to understand than it was.

碳循环因此又得纳入另一个亚循环，以致变得更加复杂难以理解。

3.You see how this epicycle theory could account for the seemingly backward motion of the planet.

你可以看到这个本轮理论是如何解释行星看起来像在做反向运动的。

4.The ancient Greeks used the concept of an epicycle to explain the complex movements of planets in the night sky.

古希腊人使用本轮的概念来解释夜空中行星的复杂运动。

5.In mathematics, an epicycle can represent a smaller circle that moves along the circumference of a larger one.

在数学中，本轮可以表示一个沿着更大圆周移动的小圆。

6.The model of epicycles was historically significant in the development of astronomy.

在天文学的发展中，本轮模型具有历史重要性。

7.To simplify the orbits of celestial bodies, astronomers introduced epicycles into their calculations.

为了简化天体的轨道，天文学家在他们的计算中引入了本轮。

8.The use of epicycles was eventually replaced by the heliocentric model proposed by Copernicus.

使用本轮的方式最终被哥白尼提出的日心模型所取代。

作文

In the history of astronomy, the concept of the epicycle (小圆周) was a crucial element in understanding the movements of celestial bodies. The term refers to a smaller circle whose center moves along the circumference of a larger one. This idea was particularly significant in the Ptolemaic system, which attempted to explain the complex motions of planets as observed from Earth. The use of epicycles (小圆周) allowed astronomers to account for the retrograde motion of planets, where they appear to move backward in the sky relative to the stars. The Ptolemaic model placed Earth at the center of the universe, with planets moving in circular orbits around it. However, the actual paths of planets are not perfect circles; they are elliptical, as later described by Johannes Kepler. To reconcile this discrepancy, Ptolemy introduced the concept of epicycles (小圆周). Each planet would move in a small circle while simultaneously traveling along a larger circular path. This intricate system of epicycles (小圆周) made it possible to predict planetary positions with reasonable accuracy, despite the fundamental flaws in the geocentric model. The introduction of epicycles (小圆周) was a remarkable achievement in ancient astronomy, showcasing the human desire to understand the cosmos. However, as observational techniques improved and new theories emerged, the limitations of the Ptolemaic system became apparent. Copernicus proposed a heliocentric model, placing the Sun at the center of the solar system, which eliminated the need for epicycles (小圆周) in explaining planetary motion. Despite its historical significance, the reliance on epicycles (小圆周) also illustrates how scientific models can evolve over time. Initially, the concept provided a framework to make sense of the heavens, but as knowledge advanced, it was replaced by more accurate representations of celestial mechanics. The eventual acceptance of Kepler's laws of planetary motion marked a turning point in astronomy, leading to a deeper understanding of gravitational forces and orbital dynamics. Today, the term epicycle (小圆周) is often used metaphorically in various fields, including economics and sociology, to describe complex systems that involve cycles within cycles. For example, in economic theory, one might refer to the epicycles (小圆周) of market trends, where short-term fluctuations occur within the broader context of long-term growth or decline. This usage underscores the relevance of the concept beyond its original astronomical context, highlighting the interconnectedness of different phenomena. In conclusion, the concept of the epicycle (小圆周) serves as a fascinating example of how humanity has sought to explain the natural world. From its origins in ancient astronomy to its metaphorical applications today, the epicycle (小圆周) represents both the ingenuity and the limitations of scientific inquiry. As we continue to explore the complexities of our universe, we must remain open to new ideas and be willing to revise our models in light of new evidence. The journey of understanding is ongoing, and the legacy of the epicycle (小圆周) reminds us of the importance of adaptability in the pursuit of knowledge.

在天文学的历史中，epicycle（小圆周）这一概念是理解天体运动的重要元素。这个术语指的是一个小圆，其中心沿着一个更大圆的周长移动。这个想法在托勒密系统中尤为重要，该系统试图解释从地球观察到的行星复杂运动。使用epicycles（小圆周）使天文学家能够解释行星的逆行运动，即它们相对于恒星向后移动的现象。 托勒密模型将地球置于宇宙的中心，行星围绕其运动。然而，行星的实际轨迹并不是完美的圆形；它们是椭圆形的，正如约翰内斯·开普勒后来的描述。为了调和这一差异，托勒密引入了epicycles（小圆周）的概念。每颗行星在同时沿着一个更大的圆形路径移动的同时，也会在一个小圆上运动。这一复杂的epicycles（小圆周）系统使得以合理的准确性预测行星位置成为可能，尽管地心模型存在根本缺陷。 引入epicycles（小圆周）是古代天文学的一项显著成就，展示了人类理解宇宙的渴望。然而，随着观测技术的提高和新理论的出现，托勒密系统的局限性逐渐显露。哥白尼提出了一个日心模型，将太阳置于太阳系的中心，从而消除了在解释行星运动时对epicycles（小圆周）的需求。 尽管其历史意义重大，但依赖epicycles（小圆周）也说明了科学模型如何随着时间的推移而演变。最初，这一概念提供了一个框架来理解天空，但随着知识的进步，它被更准确的天体力学表示所取代。最终接受开普勒的行星运动定律标志着天文学的一个转折点，导致对引力和轨道动力学的更深刻理解。 今天，术语epicycle（小圆周）常常在各个领域中以比喻的方式使用，包括经济学和社会学，用于描述涉及循环与循环的复杂系统。例如，在经济理论中，人们可能会提到市场趋势的epicycles（小圆周），其中短期波动发生在长期增长或衰退的更广泛背景之中。这种用法突显了这一概念超越其原始天文学背景的相关性，强调了不同现象之间的相互联系。 总之，epicycle（小圆周）这一概念作为人类寻求解释自然世界的迷人例子。从其在古代天文学中的起源到今天的比喻应用，epicycle（小圆周）既代表了科学探究的独创性，也反映了其局限性。随着我们继续探索宇宙的复杂性，我们必须保持开放的心态，并愿意根据新证据修订我们的模型。理解的旅程仍在继续，而epicycle（小圆周）的遗产提醒我们在追求知识过程中适应性的重要性。