apparent noon

简明释义

视正午

英英释义

例句

1.The farmer scheduled his irrigation for apparent noon when the sun is directly overhead.

农民安排在显性中午时进行灌溉，此时阳光正好直射。

2.The sun was at its highest point in the sky, marking the time of apparent noon.

太阳在天空中的最高点，标志着显性中午的时间。

3.During our hiking trip, we took a break at apparent noon to enjoy the view.

在我们的徒步旅行中，我们在显性中午时休息，享受美景。

4.We set our watches to local time based on apparent noon observed at the site.

我们根据现场观察到的显性中午调整了手表的本地时间。

5.Astronomers often calculate the time of apparent noon to observe celestial events.

天文学家常常计算显性中午的时间来观察天文事件。

作文

The concept of apparent noon is fascinating and plays a significant role in our understanding of time and the movement of the Earth. In simple terms, apparent noon refers to the moment when the sun reaches its highest point in the sky for a particular location. This occurrence is crucial for various fields, including astronomy, navigation, and even agriculture. Understanding apparent noon can help us appreciate how timekeeping has evolved over centuries.To grasp the significance of apparent noon, we must first consider how the sun moves across the sky. The Earth rotates on its axis, completing one full rotation approximately every 24 hours. As it turns, different parts of the Earth experience sunlight at different times, creating the cycle of day and night. However, the sun does not rise and set at the same time everywhere; this variation is influenced by geographical location and the time of year.For instance, if you are standing at a specific longitude, apparent noon occurs when the sun is directly overhead, which means it is at a 90-degree angle relative to your position. This moment is not only a point of interest for astronomers but also serves as a practical reference for determining local solar time. In fact, many ancient civilizations relied on the position of the sun to regulate their daily activities and agricultural practices.Moreover, the concept of apparent noon is essential for accurate timekeeping. Before the invention of mechanical clocks, people used sundials that measured time based on the sun's position. These sundials would indicate noon when the shadow cast by the sun was at its shortest, marking the peak of sunlight. Although modern technology has provided us with precise timekeeping methods, the principles behind apparent noon remain relevant today.In addition to its historical significance, apparent noon also has practical applications in navigation. Sailors and pilots often rely on celestial navigation, which involves using the position of the sun and stars to determine their location. By calculating the time of apparent noon, navigators can ascertain their latitude and adjust their course accordingly. This practice highlights the importance of understanding the sun's movement and its implications for travel and exploration.Furthermore, apparent noon can influence agricultural practices. Farmers need to understand the sun's path to optimize planting and harvesting times. For example, knowing when apparent noon occurs can help farmers determine the best times to irrigate their crops or assess the amount of sunlight their plants receive throughout the day. This knowledge can significantly impact crop yields and overall agricultural productivity.In conclusion, the term apparent noon encapsulates a critical aspect of our relationship with time and nature. It serves as a reminder of the intricate connections between the Earth’s rotation, the sun's position, and our daily lives. Whether for navigation, agriculture, or simply understanding the passage of time, apparent noon remains a vital concept that enriches our comprehension of the world around us. As we continue to advance technologically, the fundamental principles behind apparent noon will undoubtedly persist, reminding us of the timeless dance between our planet and the sun.

“明显中午”的概念令人着迷，并在我们理解时间和地球运动方面发挥着重要作用。简单来说，“明显中午”是指太阳在特定地点达到天空最高点的时刻。这一现象对天文学、导航甚至农业等多个领域至关重要。理解“明显中午”可以帮助我们欣赏时间计量在几个世纪中的演变。为了掌握“明显中午”的重要性，我们必须首先考虑太阳在天空中的运动。地球围绕其轴线旋转，大约每24小时完成一次完整的旋转。当它转动时，地球的不同部分在不同时间经历阳光，形成昼夜交替。然而，太阳并不是在同一时间升起和落下的；这种变化受到地理位置和季节的影响。例如，如果你站在特定的经度上，“明显中午”发生在太阳正好在你头顶的时候，这意味着它相对于你的位置信息呈90度角。这一时刻不仅是天文学家的兴趣点，也是确定当地太阳时间的实用参考。事实上，许多古代文明依靠太阳的位置来调节他们的日常活动和农业实践。此外，“明显中午”的概念对准确的时间计量至关重要。在机械钟表发明之前，人们使用日晷，根据太阳的位置来测量时间。这些日晷会在太阳投下的阴影最短时指示中午，标志着阳光的巅峰。尽管现代技术为我们提供了精确的时间计量方法，但“明显中午”背后的原则今天仍然相关。除了历史意义外，“明显中午”在导航中也具有实际应用。水手和飞行员通常依赖天文导航，这涉及利用太阳和星星的位置来确定他们的位置。通过计算“明显中午”的时间，导航员可以确定他们的纬度并相应调整航向。这一做法突显了理解太阳运动及其对旅行和探索的影响的重要性。此外，“明显中午”可以影响农业实践。农民需要了解太阳的路径，以优化种植和收获时间。例如，知道“明显中午”发生的时间可以帮助农民确定灌溉作物的最佳时间或评估植物在一天内接受的阳光量。这些知识可以显著影响作物产量和整体农业生产力。总之，术语“明显中午”概括了我们与时间和自然关系的一个关键方面。它提醒我们地球自转、太阳位置与我们日常生活之间的复杂联系。无论是为了导航、农业，还是仅仅理解时间的流逝，“明显中午”仍然是一个重要的概念，丰富了我们对周围世界的理解。随着我们继续在技术上取得进步，“明显中午”背后的基本原则无疑会持续存在，提醒我们地球与太阳之间永恒的舞蹈。