Greenwich apparent time

简明释义

格林视时

英英释义

例句

1.When planning international flights, airlines consider Greenwich apparent time (格林威治表观时间) to coordinate departure and arrival times.

在计划国际航班时，航空公司会考虑格林威治表观时间（格林威治表观时间）以协调出发和到达时间。

2.To convert local time to UTC, one must first understand Greenwich apparent time (格林威治表观时间).

要将当地时间转换为UTC，首先必须理解格林威治表观时间（格林威治表观时间）。

3.The ship's captain adjusted the navigation instruments to align with Greenwich apparent time (格林威治表观时间) for accurate positioning.

船长调整导航仪器，以便与格林威治表观时间（格林威治表观时间）对齐，以确保准确定位。

4.In astronomy, events are often scheduled based on Greenwich apparent time (格林威治表观时间) to maintain consistency across observations.

在天文学中，事件通常基于格林威治表观时间（格林威治表观时间）进行调度，以保持观察的一致性。

5.The scientific community relies on Greenwich apparent time (格林威治表观时间) for timekeeping in experiments.

科学界依赖于格林威治表观时间（格林威治表观时间）来进行实验中的计时。

作文

Understanding the concept of Greenwich apparent time is essential for anyone interested in astronomy, navigation, or even just the passage of time itself. The term refers to the time as determined by the position of the sun relative to the Greenwich meridian, which is located in Greenwich, London. This system of time measurement has historical significance and practical applications that continue to influence our daily lives.Historically, the establishment of Greenwich apparent time dates back to the early days of navigation when sailors relied on the sun's position to determine their location at sea. The sun moves across the sky, and its highest point—solar noon—indicates when it is directly overhead at a specific longitude. For places along the Greenwich meridian, this moment corresponds to the local time known as Greenwich apparent time.The significance of Greenwich apparent time extends beyond its historical roots; it laid the groundwork for the development of standardized time zones. Before the introduction of time zones, every locality had its own local mean time based on the sun's position. However, with the expansion of railroads and telegraphs in the 19th century, the need for a uniform time standard became apparent. As a result, the world adopted Greenwich Mean Time (GMT), which is closely related to Greenwich apparent time. GMT serves as a reference point for timekeeping across different regions, allowing for synchronized schedules and improved communication.In modern times, the concept of Greenwich apparent time continues to play a role in various fields. For astronomers, understanding the precise time when celestial events occur is crucial for observations and research. The calculation of Greenwich apparent time helps astronomers to predict the positions of stars and planets accurately. Similarly, in navigation, knowing the exact time enables navigators to calculate their longitude accurately, ensuring safe and efficient travel.Moreover, the advent of technology has further refined our understanding of time. With atomic clocks and global positioning systems (GPS), timekeeping has reached unprecedented accuracy. However, the fundamental principles behind Greenwich apparent time remain relevant. Even in an age dominated by digital devices, the basic concept of measuring time based on the sun's position endures.In conclusion, Greenwich apparent time is more than just a historical term; it represents a crucial aspect of our understanding of time and space. Its implications stretch from the age of exploration to contemporary science, affecting how we navigate the world today. By grasping the significance of Greenwich apparent time, we can appreciate the intricate relationship between time measurement and our daily lives. Understanding this concept not only enriches our knowledge of history but also enhances our appreciation for the precision and complexity of timekeeping in our modern world.

理解格林威治视时这一概念对于任何对天文学、导航，甚至是时间流逝本身感兴趣的人来说都是至关重要的。这个术语是指根据太阳相对于格林威治子午线的位置来确定的时间，该子午线位于伦敦的格林威治。这个时间测量系统具有历史意义和实际应用，继续影响着我们的日常生活。从历史上看，格林威治视时的建立可以追溯到航海早期，当时水手依靠太阳的位置来确定他们在海上的位置。太阳在天空中移动，其最高点——太阳正午——表示在特定经度上正好在头顶的时刻。对于沿着格林威治子午线的地方，这一时刻对应于被称为格林威治视时的当地时间。格林威治视时的重要性超出了其历史根源；它为标准化时区的发展奠定了基础。在引入时区之前，每个地方都有自己的当地平均时间，基于太阳的位置。然而，随着19世纪铁路和电报的扩展，统一时间标准的需求变得显而易见。因此，世界采用了格林威治标准时间（GMT），它与格林威治视时密切相关。GMT作为不同地区时间计算的参考点，使得日程安排得以同步，改善了交流。在现代，格林威治视时的概念在各个领域中继续发挥作用。对于天文学家来说，了解天文事件发生的确切时间对于观察和研究至关重要。格林威治视时的计算帮助天文学家准确预测恒星和行星的位置。同样，在导航中，知道确切的时间使导航员能够准确计算他们的经度，从而确保安全高效的旅行。此外，科技的出现进一步完善了我们对时间的理解。随着原子钟和全球定位系统（GPS）的发展，时间测量达到了前所未有的精确度。然而，格林威治视时背后的基本原理仍然相关。即便在数字设备主导的时代，基于太阳位置测量时间的基本概念依然存在。总之，格林威治视时不仅仅是一个历史术语；它代表了我们对时间和空间理解的一个重要方面。它的影响从探索时代延伸到当代科学，影响着我们今天如何在这个世界中导航。通过掌握格林威治视时的重要性，我们可以欣赏时间测量与我们日常生活之间复杂的关系。理解这一概念不仅丰富了我们对历史的知识，还增强了我们对现代世界中时间测量的精确性和复杂性的欣赏。