magnetic needle

简明释义

磁针

英英释义

例句

1.If the magnetic needle (磁针) is not stable, there may be interference from nearby metal objects.

如果magnetic needle (磁针)不稳定，可能是附近金属物体的干扰。

2.The magnetic needle (磁针) points towards magnetic north, helping navigators find their way.

magnetic needle (磁针)指向磁北，帮助导航员找到方向。

3.The compass works by aligning the magnetic needle (磁针) with the Earth's magnetic field.

这个指南针通过使magnetic needle (磁针)与地球的磁场对齐来工作。

4.When hiking in the woods, it’s crucial to understand how to read a magnetic needle (磁针).

在森林中徒步旅行时，了解如何读取magnetic needle (磁针)是至关重要的。

5.In a survival situation, a magnetic needle (磁针) can help you determine your direction when lost.

在生存情况下，magnetic needle (磁针)可以帮助你在迷路时确定方向。

作文

The concept of a magnetic needle is fundamental in understanding how compasses work. A magnetic needle is a small, slender magnet that is free to rotate. It aligns itself with the Earth's magnetic field, pointing towards the magnetic poles. This simple yet effective tool has guided explorers and navigators for centuries, allowing them to find their way in unfamiliar territories. The magnetic needle operates on the principle of magnetism, which is a force that can attract or repel certain materials, particularly those containing iron. The history of the magnetic needle dates back to ancient China, where it was first used for divination. It wasn't until the 11th century that the Chinese began to use it for navigation. The magnetic needle made its way to Europe by the 12th century, revolutionizing sea travel and exploration. Navigators could now determine their direction even when the sun was not visible, which was a game-changer for long voyages across the open ocean. Understanding the magnetic needle also involves knowing about its components. Typically, a magnetic needle is mounted on a pivot point, allowing it to spin freely. It is often enclosed within a protective casing, which may include a compass rose marked with cardinal directions (North, East, South, West). When using a compass, one must hold it level to ensure that the magnetic needle can align properly with the Earth's magnetic field. In addition to navigation, the magnetic needle has applications in various scientific fields. For example, it is used in experiments to study magnetic fields and forces. By observing how the magnetic needle reacts to different magnetic environments, scientists can gain insights into the nature of magnetism itself. Furthermore, the magnetic needle is an essential component of many electronic devices, such as galvanometers, which measure electric current. In modern times, while GPS technology has largely replaced traditional compasses for navigation, the magnetic needle remains relevant. It serves as a backup system in case of electronic failures, especially in remote areas where connectivity may be compromised. Knowing how to use a compass with a magnetic needle can be a vital skill for outdoor enthusiasts, hikers, and adventurers. In conclusion, the magnetic needle is more than just a simple tool; it represents a significant advancement in human navigation and exploration. Its historical significance and continued relevance in various fields make it an essential subject of study. Whether you are navigating through dense forests or sailing across vast oceans, understanding the magnetic needle can provide you with the confidence and knowledge needed to find your way. As technology continues to evolve, the basic principles of the magnetic needle remind us of our enduring connection to the natural world and the forces that guide us.

“磁针”的概念是理解指南针工作原理的基础。磁针是一种小而细长的磁体，可以自由旋转。它会与地球的磁场对齐，指向磁极。这种简单而有效的工具引导着探险者和航海家几个世纪，使他们能够在陌生的地方找到方向。磁针的工作原理是基于磁性，这是一种能够吸引或排斥某些材料的力量，特别是那些含有铁的材料。磁针的历史可以追溯到古代中国，在那里它最初用于占卜。直到11世纪，中国人开始将其用于导航。磁针在12世纪传入欧洲，彻底改变了海上旅行和探索。导航员现在即使在看不到太阳的情况下也能确定方向，这对跨越广阔海洋的长途航行来说是一个重大变化。理解磁针还需要了解其组成部分。通常，磁针安装在一个支点上，使其能够自由旋转。它通常封闭在一个保护外壳内，外壳可能包括标有基本方向（北、东、南、西）的指南针玫瑰。在使用指南针时，必须保持水平，以确保磁针能够正确对齐地球的磁场。除了导航，磁针还在各个科学领域中应用。例如，它被用于研究磁场和力的实验。通过观察磁针如何对不同的磁环境做出反应，科学家可以深入了解磁性本身。此外，磁针是许多电子设备的重要组成部分，例如测量电流的电流计。在现代，虽然GPS技术在导航中大多取代了传统指南针，但磁针仍然具有相关性。它作为电子故障时的备用系统，尤其是在连接可能受到限制的偏远地区。了解如何使用带有磁针的指南针对于户外爱好者、远足者和冒险者来说可能是一项重要技能。总之，磁针不仅仅是一个简单的工具；它代表了人类导航和探索的重要进步。它的历史意义和在各个领域的持续相关性使其成为一项重要的研究课题。无论您是在密林中导航还是在广阔的海洋中航行，理解磁针都能为您提供所需的信心和知识，让您找到自己的方向。随着科技的不断发展，磁针的基本原理提醒我们与自然世界及引导我们的力量之间的持久联系。