Jacob's staff

简明释义

十字测天仪

英英释义

例句

1.During the lecture, the professor demonstrated how to use a Jacob's staff effectively.

在讲座中，教授演示了如何有效地使用雅各之杖。

2.The astronomer used a Jacob's staff to measure the altitude of the stars.

天文学家使用雅各之杖来测量星星的高度。

3.The surveyor carried a Jacob's staff to help determine land elevations.

测量员携带雅各之杖以帮助确定土地的高度。

4.In ancient times, sailors relied on a Jacob's staff for navigation at sea.

在古代，水手依靠雅各之杖进行海上导航。

5.The Jacob's staff is an essential tool for anyone studying astronomy.

雅各之杖是任何学习天文学的人必不可少的工具。

作文

The term Jacob's staff refers to a historical instrument that was used for navigation and surveying. This device, resembling a long stick with a crosspiece, was primarily employed by sailors and explorers during the medieval period. The name itself is derived from the biblical figure Jacob, who is often associated with journeys and guidance. In this essay, I will explore the significance of Jacob's staff in the context of navigation and its impact on exploration during its time.In ancient times, navigation was a challenging endeavor. Sailors relied heavily on celestial bodies such as stars and the sun to find their way across vast oceans. However, without precise instruments, this task was fraught with difficulties. The invention of the Jacob's staff marked a pivotal moment in the history of navigation. It allowed navigators to measure the angle of celestial bodies above the horizon, thus determining their latitude more accurately.The construction of a Jacob's staff is relatively simple. It consists of a long wooden pole with a horizontal arm that can be adjusted up and down. By aligning the arm with a star or the sun, sailors could take measurements that would help them chart their course. This method was not only practical but also revolutionary, as it provided a systematic approach to navigation that had previously been lacking.The use of the Jacob's staff was particularly significant during the Age of Exploration, a period when European powers were eager to discover new lands and trade routes. Explorers like Christopher Columbus and Vasco da Gama relied on various navigational tools, including the Jacob's staff, to traverse uncharted waters. Their voyages opened up new territories and facilitated cultural exchanges that shaped the world we live in today.Moreover, the Jacob's staff laid the groundwork for more advanced navigational instruments that followed. As technology progressed, the principles behind the Jacob's staff influenced the design of the sextant and the astrolabe, both of which became essential tools for navigators in the centuries to come. These advancements allowed sailors to navigate with greater precision, ultimately leading to safer and more efficient sea travel.In addition to its practical applications, the Jacob's staff also holds symbolic meaning. It represents the human desire to explore and understand the world around us. Just as Jacob embarked on his journey seeking a better life, so too did the navigators of the past venture into the unknown, driven by curiosity and ambition. The Jacob's staff serves as a reminder of our innate need to seek knowledge and expand our horizons.In conclusion, the Jacob's staff is more than just a navigational tool; it is a testament to human ingenuity and the spirit of exploration. Its contributions to navigation during the medieval period cannot be overstated, as it enabled explorers to chart new territories and connect distant cultures. Today, while technology has advanced far beyond the simple Jacob's staff, its legacy continues to inspire those who look to the stars and dream of new adventures.

“雅各的杖”一词指的是一种历史仪器，用于导航和测量。这种设备形似一根带有横杆的长棍，主要在中世纪时期被水手和探险者使用。这个名字源自圣经人物雅各，他常常与旅程和引导联系在一起。在这篇文章中，我将探讨“雅各的杖”在导航中的重要性及其对当时探险的影响。在古代，导航是一项充满挑战的工作。水手们在广阔的海洋上航行时，严重依赖星星和太阳等天体来找到方向。然而，没有精确的仪器，这项任务充满了困难。“雅各的杖”的发明标志着导航历史上的一个重要时刻。它使导航员能够测量天体在地平线上的角度，从而更准确地确定他们的纬度。“雅各的杖”的构造相对简单。它由一根长木杆和一个可以上下调节的横臂组成。通过将横臂与星星或太阳对齐，水手可以进行测量，帮助他们绘制航线。这种方法不仅实用，而且具有革命性，因为它提供了一种系统化的导航方法，这是之前所缺乏的。“雅各的杖”的使用在探索时代尤其重要，这是一个欧洲列强渴望发现新土地和贸易路线的时期。像克里斯托弗·哥伦布和瓦斯科·达·伽马这样的探险者依靠各种导航工具，包括“雅各的杖”，穿越未知的水域。他们的航行开辟了新领土，促进了塑造我们今天世界的文化交流。此外，“雅各的杖”也为后来的更先进的导航仪器奠定了基础。随着技术的发展，“雅各的杖”背后的原理影响了六分仪和星盘的设计，这两种仪器在接下来的几个世纪中成为导航员的基本工具。这些进步使水手能够更精确地导航，最终导致更安全、更高效的海上旅行。除了其实用应用外，“雅各的杖”还具有象征意义。它代表了人类探索和理解周围世界的愿望。正如雅各踏上旅程寻求更好的生活一样，过去的导航员也勇敢地走向未知，受到好奇心和雄心的驱动。“雅各的杖”提醒我们，人类天生就渴望寻求知识和拓展视野。总之，“雅各的杖”不仅仅是一种导航工具；它是人类聪明才智和探索精神的见证。它对中世纪时期导航的贡献不容小觑，因为它使探险者能够绘制新领土并连接遥远的文化。如今，虽然技术已经远远超越了简单的“雅各的杖”，但它的遗产仍然激励着那些仰望星空、梦想新冒险的人。