mean solar day

简明释义

平太阳日

英英释义

例句

1.Scientists use the concept of a mean solar day to standardize timekeeping.

科学家使用平均太阳日的概念来标准化时间记录。

2.The calendar year is based on the number of mean solar days in a year.

日历年是基于一年中的平均太阳日数量。

3.The length of a mean solar day is approximately 24 hours.

一个平均太阳日的长度大约是24小时。

4.A mean solar day is defined as the average time it takes for the Earth to rotate once on its axis.

一个平均太阳日被定义为地球自转一次所需的平均时间。

5.Leap years account for the extra mean solar day every four years.

闰年每四年增加一个额外的平均太阳日。

作文

The concept of a mean solar day is fundamental to our understanding of time and how we measure it. A mean solar day is defined as the average length of a day based on the position of the Earth in relation to the Sun. It is approximately 24 hours long, which is the time it takes for the Earth to complete one full rotation on its axis relative to the Sun. This measurement is crucial because it provides a consistent framework for organizing our daily lives, scheduling activities, and coordinating with others across different regions of the world.Historically, the measurement of a day has not always been straightforward. The Earth's rotation is not perfectly uniform; it can vary slightly due to factors such as gravitational interactions with the Moon and other celestial bodies. As a result, the actual solar day—the time from one noon to the next—can differ from the mean solar day. To account for these variations, we use the concept of the mean solar day as a standard reference.In practical terms, the mean solar day allows us to create a reliable system of timekeeping. Clocks and calendars are designed around this average measurement, ensuring that people can synchronize their activities effectively. Without the mean solar day, coordinating events like travel, work, and communication would be far more complicated. For instance, when scheduling a meeting across different time zones, understanding the mean solar day helps individuals align their schedules accurately.Moreover, the importance of the mean solar day extends beyond mere convenience. It plays a significant role in scientific research and exploration. Astronomers and researchers rely on precise measurements of time to study celestial phenomena, track the movement of planets, and conduct experiments that require exact timing. The mean solar day serves as a baseline for these calculations, allowing scientists to compare data and draw meaningful conclusions about the universe.In our modern world, technology has further refined our understanding of the mean solar day. Atomic clocks, which are incredibly precise, have allowed us to measure time with unprecedented accuracy. These advancements have led to the establishment of Coordinated Universal Time (UTC), which is based on atomic time but is adjusted to remain in sync with the mean solar day. This synchronization ensures that our clocks remain accurate and that we maintain a consistent relationship with the natural cycles of day and night.In conclusion, the mean solar day is a vital concept that underpins our daily lives, scientific endeavors, and technological advancements. By providing a stable reference point for measuring time, it enables us to navigate the complexities of our world with ease. Understanding the mean solar day not only enriches our grasp of timekeeping but also enhances our appreciation for the intricate relationship between Earth and the cosmos.

“平均太阳日”这一概念对我们理解时间及其测量方式至关重要。“平均太阳日”被定义为基于地球与太阳之间位置的日子的平均长度。它大约为24小时，这是地球相对于太阳完成一次完整自转所需的时间。这个测量至关重要，因为它为组织我们的日常生活、安排活动以及协调不同地区的人们提供了一种一致的框架。历史上，日子的测量并非总是简单明了。地球的自转并不完全均匀；由于与月球和其他天体的引力相互作用等因素，它可能略有变化。因此，实际的太阳日（从一个中午到下一个中午的时间）可能与“平均太阳日”有所不同。为了考虑这些变化，我们使用“平均太阳日”这一概念作为标准参考。在实际操作中，“平均太阳日”使我们能够创建一个可靠的计时系统。时钟和日历是围绕这一平均测量设计的，确保人们能够有效地同步活动。如果没有“平均太阳日”，协调旅行、工作和沟通等事件将变得更加复杂。例如，在跨不同时区安排会议时，理解“平均太阳日”有助于个人准确对齐他们的日程。此外，“平均太阳日”的重要性不仅仅体现在便利性上。它在科学研究和探索中也发挥着重要作用。天文学家和研究人员依赖精确的时间测量来研究天体现象、追踪行星运动以及进行需要精确计时的实验。“平均太阳日”作为这些计算的基准，使科学家能够比较数据，并得出关于宇宙的有意义的结论。在我们现代世界中，技术进一步提高了我们对“平均太阳日”的理解。原子钟，这种极其精确的设备，使我们能够以前所未有的准确性测量时间。这些进步导致了协调世界时（UTC）的建立，UTC基于原子时间，但经过调整以保持与“平均太阳日”的同步。这种同步确保我们的时钟保持准确，并且我们与自然昼夜周期保持一致的关系。总之，“平均太阳日”是一个重要概念，支撑着我们的日常生活、科学努力和技术进步。通过提供一个稳定的时间测量参考点，它使我们能够轻松应对世界的复杂性。理解“平均太阳日”不仅丰富了我们对计时的理解，也增强了我们对地球与宇宙之间错综复杂关系的欣赏。