cross staff

简明释义

十字测天仪

英英释义

例句

1.The cross staff is a simple yet effective tool for measuring angles in surveying.

cross staff是测量角度的简单而有效的工具，常用于测绘。

2.To calculate the angle of elevation, the astronomer adjusted the cross staff carefully.

为了计算仰角，天文学家小心地调整了cross staff。

3.In ancient times, a cross staff was essential for mariners to determine their latitude at sea.

在古代，cross staff对航海者来说是确定海上纬度的必备工具。

4.The sailor used a cross staff to measure the height of the stars for navigation.

水手使用cross staff来测量星星的高度以进行导航。

5.During the geography lesson, the teacher demonstrated how to use a cross staff effectively.

在地理课上，老师演示了如何有效地使用cross staff。

作文

The term cross staff refers to a navigational instrument that was widely used during the Age of Exploration. This tool allowed sailors and explorers to measure angles between celestial bodies and the horizon, which was essential for determining latitude at sea. The cross staff consists of a long stick with a perpendicular arm, which can be adjusted to align with the stars or the sun. By observing these celestial bodies, navigators could chart their course across vast oceans with greater accuracy.In the context of maritime history, the invention of the cross staff represented a significant advancement in navigation techniques. Before its widespread use, sailors relied on less accurate methods, such as dead reckoning, which depended heavily on estimations of speed and direction. The cross staff provided a more scientific approach to navigation, allowing for more reliable travel across treacherous waters.One of the most notable figures associated with the use of the cross staff was the famous explorer Ferdinand Magellan. During his expedition to circumnavigate the globe, Magellan utilized this instrument to navigate the uncharted waters of the Pacific Ocean. His successful voyage not only demonstrated the effectiveness of the cross staff but also paved the way for future explorers who would rely on similar tools to expand their knowledge of the world.However, the cross staff was not without its limitations. For instance, it required a clear view of the horizon and the celestial bodies, which could be challenging in rough seas or poor weather conditions. As navigation technology evolved, the cross staff eventually gave way to more advanced instruments, such as the sextant. Despite its obsolescence, the cross staff remains an important part of maritime history, symbolizing the ingenuity and determination of early navigators.Today, the cross staff is often studied in historical contexts and is sometimes used in educational settings to teach students about the principles of navigation and astronomy. Its simple design and practical application make it an excellent example of how early innovations laid the groundwork for modern navigational tools. Learning about the cross staff not only enriches our understanding of navigation but also highlights the spirit of exploration that has driven humanity to seek out new frontiers throughout history.In conclusion, the cross staff is a fascinating instrument that played a crucial role in the development of navigation. Its ability to measure angles between celestial bodies and the horizon allowed sailors to traverse the oceans with more confidence. As we reflect on the contributions of the cross staff to maritime history, we are reminded of the importance of innovation and exploration in shaping our understanding of the world. The legacy of the cross staff lives on, inspiring future generations to continue pushing the boundaries of human knowledge and adventure.

“cross staff”指的是一种在探索时代广泛使用的导航工具。这个工具允许水手和探险家测量天体与地平线之间的角度，这对于确定海上的纬度至关重要。cross staff由一根长棍和一个垂直的臂组成，可以调整以与星星或太阳对齐。通过观察这些天体，导航员可以更准确地绘制他们穿越浩瀚海洋的航线。在海洋历史的背景下，cross staff的发明代表了导航技术的重大进步。在其广泛使用之前，水手依赖于不太准确的方法，例如死算，这主要依靠速度和方向的估算。cross staff提供了一种更科学的导航方法，使得在危险水域中的旅行更加可靠。与使用cross staff相关的最著名的人物之一是著名探险家费尔南多·麦哲伦。在他环绕地球的探险中，麦哲伦利用这一工具在太平洋的未知水域进行导航。他的成功航行不仅证明了cross staff的有效性，也为未来的探险者铺平了道路，他们将依赖类似的工具来扩展对世界的认识。然而，cross staff也并非没有局限性。例如，它需要清晰的地平线和天体的视野，而在恶劣海况或糟糕天气条件下，这可能会变得具有挑战性。随着导航技术的发展，cross staff最终被更先进的仪器所取代，如六分仪。尽管它已不再使用，但cross staff仍然是海洋历史中重要的一部分，象征着早期导航者的聪明才智和决心。今天，cross staff常常在历史背景下进行研究，有时在教育环境中用于教导学生关于导航和天文学的原理。它简单的设计和实用的应用使其成为早期创新如何为现代导航工具奠定基础的优秀例证。了解cross staff不仅丰富了我们对导航的理解，还突显了推动人类探索新边界的探索精神。总之，cross staff是一种迷人的仪器，在导航发展中发挥了至关重要的作用。它能够测量天体与地平线之间的角度，使水手能够更自信地横渡海洋。当我们回顾cross staff对海洋历史的贡献时，我们想起创新和探索在塑造我们对世界的理解中的重要性。cross staff的遗产仍在继续，激励着未来的世代不断推动人类知识和冒险的边界。