Greenwich apparent time

简明释义

格林时

英英释义

例句

1.To synchronize our watches, we referred to the Greenwich apparent time (格林威治视时) as a universal standard.

为了同步我们的手表，我们参考了Greenwich apparent time (格林威治视时) 作为一个通用标准。

2.The ship's captain adjusted the navigational charts based on the Greenwich apparent time (格林威治视时) to ensure accurate positioning.

船长根据Greenwich apparent time (格林威治视时) 调整了航海图，以确保定位准确。

3.In navigation, Greenwich apparent time (格林威治视时) is crucial for determining longitude accurately.

在导航中，Greenwich apparent time (格林威治视时) 对于准确确定经度至关重要。

4.The difference between local time and Greenwich apparent time (格林威治视时) can affect flight schedules.

地方时间与Greenwich apparent time (格林威治视时) 之间的差异可能会影响航班时刻表。

5.Astronomers often use Greenwich apparent time (格林威治视时) when calculating the positions of celestial bodies.

天文学家在计算天体位置时常使用Greenwich apparent time (格林威治视时)。

作文

The concept of time has always been a fascinating subject for humanity. One particular term that stands out in the realm of timekeeping is Greenwich apparent time, which refers to the local solar time at the Prime Meridian located in Greenwich, London. This time measurement is based on the position of the sun in the sky, making it a natural and intuitive way to understand the passage of time. Unlike standard time, which is divided into hours and minutes based on time zones, Greenwich apparent time aligns closely with the actual movement of the sun, providing a more organic sense of day and night.In ancient times, people relied heavily on the sun's position to determine the time of day. They would observe the sun's journey across the sky, noting when it reached its highest point—noon. This practice was universal, but as societies grew and expanded, the need for a standardized time system became evident. The establishment of Greenwich apparent time as a reference point was a significant milestone in this evolution.The Prime Meridian, established in 1884, serves as the zero-degree longitude line from which all other time zones are measured. When we talk about Greenwich apparent time, we are essentially discussing the time at which the sun is directly overhead at the Prime Meridian. This concept is crucial for navigation and astronomy, as it helps sailors and scientists synchronize their activities with the natural rhythms of the Earth.One of the interesting aspects of Greenwich apparent time is its variability throughout the year. Due to the Earth's elliptical orbit and axial tilt, the length of a solar day can differ slightly. This phenomenon, known as the equation of time, means that Greenwich apparent time does not always align perfectly with clock time. For example, there are days when solar noon occurs several minutes before or after the clock strikes noon. This discrepancy highlights the complexity of measuring time and the importance of understanding the relationship between solar time and mechanical timekeeping devices.In modern society, the significance of Greenwich apparent time extends beyond mere timekeeping; it symbolizes a global standard that facilitates communication and coordination across different regions. With the advent of technology, especially in the fields of telecommunications and aviation, having a common reference point for time has become essential. International agreements often use Greenwich apparent time as a baseline for scheduling flights, broadcasting programs, and conducting business transactions.Moreover, the concept of Greenwich apparent time continues to influence various fields, including science, philosophy, and even art. It raises questions about the nature of time itself and how humans perceive it. Is time merely a construct, or is it intrinsically linked to the natural world? Artists and writers have long grappled with these ideas, often drawing inspiration from the cyclical patterns of day and night as dictated by the sun’s position.In conclusion, Greenwich apparent time is more than just a technical term; it represents a fundamental aspect of our relationship with time. By understanding its origins and implications, we can appreciate the intricate ways in which time influences our lives. Whether we are navigating the seas, planning our daily schedules, or pondering the philosophical aspects of existence, the concept of Greenwich apparent time remains a vital part of our understanding of the world around us.

时间的概念一直是人类一个引人入胜的话题。在时间测量的领域中，有一个特别的术语脱颖而出，那就是格林威治太阳时，它指的是位于伦敦格林威治的本初子午线的地方太阳时间。这种时间测量基于太阳在天空中的位置，使其成为一种自然和直观的理解时间流逝的方式。与根据时区划分的标准时间不同，格林威治太阳时与太阳的实际运动紧密相连，为昼夜提供了更有机的感知。在古代，人们在很大程度上依赖太阳的位置来确定一天中的时间。他们会观察太阳在天空中的旅程，注意到它达到最高点——正午的时间。这种做法是普遍的，但随着社会的发展和扩展，标准化时间系统的需求变得显而易见。将格林威治太阳时作为参考点的建立是这一演变中的一个重要里程碑。本初子午线于1884年确立，作为零度经线，从这里开始测量所有其他时区。当我们谈论格林威治太阳时时，我们实际上是在讨论太阳在本初子午线正上方时的时间。这一概念对导航和天文学至关重要，因为它帮助水手和科学家将他们的活动与地球的自然节奏同步。格林威治太阳时的一个有趣之处在于它在一年中的可变性。由于地球的椭圆轨道和轴倾角，太阳日的长度可能会有所不同。这一现象称为时间方程，意味着格林威治太阳时并不总是与钟表时间完美对齐。例如，有些日子，太阳正午发生在钟表敲响正午之前或之后几分钟。这种差异突显了测量时间的复杂性，以及理解太阳时间与机械计时设备之间关系的重要性。在现代社会中，格林威治太阳时的意义不仅限于时间测量；它象征着一个全球标准，促进了不同地区之间的沟通和协调。随着技术，尤其是在电信和航空领域的发展，拥有一个共同的时间参考点变得至关重要。国际协议通常将格林威治太阳时作为安排航班、广播节目和进行商业交易的基准。此外，格林威治太阳时的概念继续影响科学、哲学甚至艺术等各个领域。它引发了关于时间本质及人类如何感知时间的问题。时间仅仅是一个构造，还是与自然世界内在联系的东西？艺术家和作家长期以来一直在思考这些问题，常常从太阳位置所决定的昼夜循环模式中汲取灵感。总之，格林威治太阳时不仅仅是一个技术术语；它代表了我们与时间关系的基本方面。通过理解它的起源和影响，我们可以欣赏时间如何以错综复杂的方式影响我们的生活。无论我们是在航海、规划日常安排还是思考存在的哲学方面，格林威治太阳时的概念仍然是我们理解周围世界的重要组成部分。