local mean time

简明释义

地方平时

英英释义

例句

1.The conference call is set for 2 PM local mean time.

电话会议定于下午2点当地平均时间进行。

2.The event will start at 10 AM local mean time sharp.

活动将在上午10点整当地平均时间开始。

3.Please note that the flight departs at 6 PM local mean time.

请注意，航班在下午6点当地平均时间起飞。

4.We need to adjust our watches to local mean time for the meeting.

我们需要将手表调整到会议的当地平均时间。

5.The train is scheduled to arrive at 3 PM local mean time.

火车预计在下午3点当地平均时间到达。

作文

In the realm of timekeeping, the concept of local mean time plays a crucial role in how we understand and measure time based on our geographical location. The term refers to the mean solar time at a specific location, which is determined by the position of the sun in relation to the observer's meridian. This means that local mean time is not a universal standard; rather, it varies from one place to another depending on the local longitude. Historically, before the advent of standardized time zones, people relied heavily on local mean time to organize their daily lives. For instance, a town would set its clocks according to the position of the sun at noon, when the sun was at its highest point in the sky. This method provided a practical way for communities to synchronize their activities, such as opening and closing markets, scheduling public events, and coordinating transportation.However, as societies grew and transportation improved, the discrepancies between different regions' local mean time became more pronounced. Trains, for example, needed a reliable schedule to operate efficiently across various towns and cities. This led to the establishment of standardized time zones in the late 19th century, where regions adopted a uniform time instead of relying solely on local mean time. Despite this shift, the concept remains significant in understanding how time is experienced differently around the world.In modern times, local mean time is often overshadowed by Coordinated Universal Time (UTC) and the various time zones that are derived from it. However, it still holds relevance in fields such as astronomy, navigation, and even in some cultural practices. For astronomers, knowing the local mean time is essential for accurately tracking celestial events and conducting observations. Similarly, navigators use local mean time to calculate their position at sea, ensuring safe passage through the oceans.Moreover, the concept of local mean time serves as a reminder of the natural rhythms of the Earth. As we become increasingly reliant on technology and globalized time systems, it is easy to forget the importance of our local environment and its influence on our daily lives. The rising and setting of the sun, the changing seasons, and even the phases of the moon all contribute to our understanding of time, and local mean time encapsulates this relationship beautifully.In conclusion, while the world may operate on a standardized system of timekeeping, the idea of local mean time remains an important aspect of how we perceive and interact with time. It reflects our connection to the Earth and reminds us that time is not just a number on a clock, but a fundamental part of our existence that is influenced by our surroundings. As we continue to navigate the complexities of modern life, acknowledging the significance of local mean time can enrich our understanding of both time and place, allowing us to appreciate the unique experiences that different locales offer. Ultimately, whether we are scheduling a meeting across time zones or simply enjoying a sunset, the notion of local mean time invites us to consider the interplay between time and our local context, fostering a deeper appreciation for the world around us.

在时间测量的领域中，地方平均时间的概念在我们理解和衡量基于地理位置的时间方面发挥着至关重要的作用。这个术语指的是特定地点的平均太阳时间，它是根据太阳相对于观察者经度的位置来确定的。这意味着地方平均时间并不是一个普遍的标准；而是根据当地的经度在不同地方有所不同。历史上，在标准化时区出现之前，人们在组织日常生活时严重依赖于地方平均时间。例如，一个城镇会根据中午太阳在天空中的最高点来设置时钟。这种方法为社区提供了一种实用的方式来同步他们的活动，例如开市和闭市、安排公共活动以及协调交通。然而，随着社会的发展和交通的改善，不同地区的地方平均时间之间的差异变得更加明显。例如，火车需要可靠的时间表以便高效地在各个城镇和城市之间运行。这导致了19世纪末标准化时区的建立，各个地区采用统一的时间，而不再仅仅依赖于地方平均时间。尽管发生了这种转变，但这一概念在理解全球时间体验的不同方面仍然具有重要意义。在现代，地方平均时间常常被协调世界时（UTC）和由此衍生的各种时区所掩盖。然而，它在天文学、导航甚至一些文化实践中仍然具有相关性。对于天文学家来说，了解地方平均时间对于准确跟踪天体事件和进行观察至关重要。类似地，航海者使用地方平均时间来计算他们在海上的位置，确保安全通过海洋。此外，地方平均时间的概念提醒我们关注地球的自然节奏。当我们越来越依赖技术和全球化的时间系统时，容易忘记我们本地环境的重要性及其对我们日常生活的影响。太阳的升起和落下、季节的变化，甚至月相的变化都对我们理解时间有着重要的影响，而地方平均时间完美地概括了这种关系。总之，虽然世界可能在一个标准化的时间测量系统上运作，但地方平均时间的理念仍然是我们感知和与时间互动的重要方面。它反映了我们与地球的联系，并提醒我们时间不仅仅是时钟上的一个数字，而是我们存在的基本部分，受到我们周围环境的影响。随着我们继续在现代生活的复杂性中航行，承认地方平均时间的重要性可以丰富我们对时间和地点的理解，让我们更好地欣赏不同地方所提供的独特体验。最终，无论我们是在跨时区安排会议还是简单地享受日落，地方平均时间的概念都邀请我们思考时间与当地环境之间的相互作用，培养对周围世界的更深刻欣赏。