Greenwich mean astronomical time

简明释义

格林标准天文时间

英英释义

例句

1.In scientific research, Greenwich mean astronomical time is used as a standard reference for timing experiments.

在科学研究中，格林威治平均天文时间被用作实验时间的标准参考。

2.When planning international calls, it's important to convert your local time to Greenwich mean astronomical time.

在计划国际电话时，将您的当地时间转换为格林威治平均天文时间是很重要的。

3.Astronomers often refer to Greenwich mean astronomical time when observing celestial events.

天文学家在观察天文事件时常常提到格林威治平均天文时间。

4.The ship's captain relied on Greenwich mean astronomical time for precise navigation across the ocean.

船长依赖于格林威治平均天文时间进行海洋的精确导航。

5.The satellite's position was calculated using the Greenwich mean astronomical time, which is essential for accurate navigation.

卫星的位置是使用格林威治平均天文时间计算的，这对于精确导航至关重要。

作文

The concept of time has always been a crucial aspect of human civilization, guiding our daily activities and interactions. One of the most significant contributions to our understanding of time is the establishment of the standard time system, which allows us to synchronize our clocks and schedules across different regions. At the heart of this system lies the concept of Greenwich mean astronomical time, a term that may sound complex but is essential for accurate timekeeping worldwide.Historically, the need for a standardized time arose from the expansion of trade and communication. As ships sailed across oceans and railroads connected distant cities, it became increasingly important to have a common reference point for time. This led to the establishment of the Prime Meridian at Greenwich, London, in 1884 during the International Meridian Conference. The Greenwich mean astronomical time was defined as the mean solar time at this meridian, which is situated at 0 degrees longitude.The significance of Greenwich mean astronomical time extends beyond mere convenience; it has profound implications for navigation and astronomy. Before its establishment, local mean times were used, which varied from one location to another due to the Earth's rotation. This inconsistency posed challenges for sailors who relied on celestial navigation. By adopting Greenwich mean astronomical time as a universal standard, navigators could calculate their position more accurately using the stars and the sun.Moreover, Greenwich mean astronomical time serves as the basis for Coordinated Universal Time (UTC), which is now the world's primary time standard. UTC is crucial for various global activities, including telecommunications, aviation, and the internet. It ensures that people across different time zones can coordinate their efforts seamlessly, fostering international collaboration and communication.In addition to its practical applications, Greenwich mean astronomical time also holds a symbolic value. It represents humanity's quest for order in the chaotic realm of time. As we continue to explore the universe, understanding time becomes even more critical. For instance, scientists studying black holes and the fabric of spacetime rely on precise measurements of time to validate their theories. In this sense, Greenwich mean astronomical time is not just a historical artifact but a living concept that continues to influence our scientific endeavors.Furthermore, the advent of technology has transformed how we perceive and measure time. Atomic clocks, which are incredibly accurate, have replaced traditional methods of timekeeping. However, the foundation laid by Greenwich mean astronomical time remains integral to these advancements. Even in an era dominated by technology, the principles of time established at Greenwich continue to guide our understanding and utilization of time.In conclusion, the term Greenwich mean astronomical time encapsulates a vital part of our history and daily lives. It symbolizes the importance of standardization in a world that thrives on connectivity and precision. As we move forward into an increasingly interconnected future, the relevance of Greenwich mean astronomical time will only grow, reminding us of our shared commitment to a common framework that transcends borders and cultures. Understanding this term not only enriches our knowledge of timekeeping but also highlights the collaborative spirit of humanity in its pursuit of knowledge and progress.

时间的概念一直是人类文明的重要组成部分，引导着我们的日常活动和互动。标准时间系统的建立是我们理解时间的一个重要贡献，它使我们能够在不同地区同步我们的时钟和日程。在这个系统的核心是格林威治平均天文时间这一概念，虽然这个术语听起来复杂，但它对全球准确的时间测量至关重要。历史上，标准化时间的需求源于贸易和通信的扩展。随着船只穿越海洋，铁路连接遥远的城市，拥有一个共同的时间参考点变得越来越重要。这导致了1884年国际子午线会议上在伦敦格林威治设立本初子午线。格林威治平均天文时间被定义为该子午线的平均太阳时间，该子午线位于0度经度。格林威治平均天文时间的重要性不仅仅在于便利，它对导航和天文学有深远的影响。在其建立之前，各地使用地方平均时间，由于地球的自转，这种时间因地而异。这种不一致给依赖天体导航的水手带来了挑战。通过采用格林威治平均天文时间作为全球标准，导航员可以利用星星和太阳更准确地计算他们的位置。此外，格林威治平均天文时间是协调世界时间（UTC）的基础，现在UTC是全球主要的时间标准。UTC对各种全球活动至关重要，包括电信、航空和互联网。它确保不同时间区的人们能够无缝协调他们的努力，促进国际合作与交流。除了实际应用，格林威治平均天文时间也具有象征意义。它代表了人类在混沌的时间领域中追求秩序的努力。随着我们继续探索宇宙，理解时间变得更加重要。例如，研究黑洞和时空结构的科学家依赖于精确的时间测量来验证他们的理论。从这个意义上说，格林威治平均天文时间不仅是一个历史遗物，而是一个活生生的概念，继续影响着我们的科学探索。此外，科技的出现改变了我们对时间的感知和测量。原子钟，这种极其精确的时钟，已经取代了传统的计时方法。然而，格林威治平均天文时间奠定的基础仍然是这些进步的重要组成部分。即使在一个以技术为主导的时代，在格林威治建立的时间原则仍然指导着我们对时间的理解和利用。总之，格林威治平均天文时间这一术语概括了我们历史和日常生活中的一个重要部分。它象征着在一个依赖连接和精确的世界中标准化的重要性。随着我们走向一个日益互联的未来，格林威治平均天文时间的相关性只会增加，提醒我们共同致力于一个超越国界和文化的共同框架。理解这个术语不仅丰富了我们对时间测量的知识，也突显了人类在追求知识和进步过程中的合作精神。