hand crank

简明释义

手动曲柄

英英释义

例句

1.He used a hand crank to start the old car engine.

他用一个手摇曲柄来启动老式汽车发动机。

2.She turned the hand crank to make fresh apple cider.

她转动手摇曲柄制作新鲜的苹果酒。

3.During the power outage, we relied on a hand crank flashlight.

在停电期间，我们依靠一个手摇曲柄手电筒。

4.The fishing reel has a hand crank for easy retrieval of the line.

这个钓鱼卷线器有一个手摇曲柄，便于轻松收回钓线。

5.The antique music box plays when you turn the hand crank.

古董音乐盒在你转动手摇曲柄时会播放音乐。

作文

The evolution of technology has brought about numerous innovations that have changed the way we live and work. However, some traditional tools still hold significant value, such as the hand crank (手摇发电机). This simple yet effective device has been used for centuries in various applications, from early automobiles to modern-day generators. Understanding the importance and functionality of the hand crank can provide insights into both historical and contemporary engineering practices.A hand crank is a mechanical device that converts manual labor into rotational energy. It consists of a handle attached to a shaft, which can be rotated by hand. The basic principle behind the hand crank is straightforward: as the user turns the handle, the shaft rotates, transferring energy to whatever device it is connected to. This mechanism has been utilized in many different contexts, including starting engines, operating machinery, and generating electricity.One of the most iconic uses of the hand crank is in early automobiles. In the late 19th and early 20th centuries, cars were often started using a hand crank. Drivers would insert the crank into the front of the vehicle and turn it to engage the engine. This method required physical strength and skill, as improper cranking could lead to injury or damage to the vehicle. Despite its challenges, the hand crank was a crucial innovation that enabled the widespread adoption of motor vehicles.In addition to automobiles, the hand crank has found its place in various other machines. For instance, many vintage sewing machines feature a hand crank mechanism that allows users to control the sewing process manually. This hands-on approach gives sewers a greater sense of connection to their craft, as they can adjust the speed and tension of the fabric as needed.Moreover, the hand crank is still relevant today, especially in portable generators and emergency devices. During power outages or in remote locations, a hand crank generator can provide essential electricity without relying on fuel or batteries. Users can generate power by simply turning the crank, making it an invaluable tool for camping trips, outdoor activities, or emergency preparedness.The simplicity and effectiveness of the hand crank also serve as a reminder of the ingenuity of past inventions. In a world increasingly dominated by digital technology and automation, the hand crank symbolizes the importance of manual skills and the satisfaction derived from hands-on work. It encourages us to appreciate the craftsmanship involved in creating and using mechanical devices, fostering a deeper understanding of how things work.In conclusion, the hand crank (手摇发电机) is more than just a relic of the past; it is a testament to human innovation and adaptability. From its role in early automobiles to its use in modern generators, the hand crank remains a valuable tool in various applications. By studying its design and function, we can gain a greater appreciation for the intersection of technology and craftsmanship, reminding us that sometimes, the simplest solutions are the most effective.

科技的演变带来了无数创新，改变了我们的生活和工作方式。然而，一些传统工具仍然具有重要价值，例如手摇发电机。这个简单而有效的设备已经在多个应用中使用了几个世纪，从早期汽车到现代发电机。理解手摇发电机的重要性和功能，可以为我们提供对历史和当代工程实践的深入见解。手摇发电机是一种机械装置，将人工劳动转化为旋转能量。它由一个把手和一个轴组成，用户可以用手转动。手摇发电机的基本原理很简单：当用户转动把手时，轴旋转，将能量传递给它连接的任何设备。这个机制在许多不同的背景下得到了利用，包括启动发动机、操作机器和发电。手摇发电机最具标志性的用途之一是在早期汽车中。在19世纪末和20世纪初，汽车通常使用手摇发电机启动。司机会将曲柄插入车辆前部并转动它以启动发动机。这种方法需要体力和技巧，因为不当的摇动可能导致受伤或对车辆造成损坏。尽管有挑战，手摇发电机是使机动车辆广泛采用的重要创新。除了汽车，手摇发电机还在其他许多机器中找到了位置。例如，许多复古缝纫机采用手摇发电机机制，允许用户手动控制缝纫过程。这种动手的方法使缝纫工与他们的工艺有更大的联系，因为他们可以根据需要调整面料的速度和张力。此外，手摇发电机在今天仍然相关，特别是在便携式发电机和应急设备中。在停电或偏远地区，手摇发电机可以提供基本电力，而无需依赖燃料或电池。用户只需转动曲柄即可发电，使其成为露营旅行、户外活动或应急准备中不可或缺的工具。手摇发电机的简单性和有效性也提醒我们过去发明的独创性。在一个越来越被数字技术和自动化主导的世界里，手摇发电机象征着手工技能的重要性以及从动手工作中获得的满足感。它鼓励我们欣赏创造和使用机械设备所涉及的工艺，培养对事物运作原理的更深刻理解。总之，手摇发电机不仅仅是过去的遗物；它是人类创新和适应能力的证明。从早期汽车中的作用到现代发电机的使用，手摇发电机在各种应用中仍然是一个有价值的工具。通过研究其设计和功能，我们可以更好地欣赏技术与工艺之间的交汇，提醒我们有时，最简单的解决方案是最有效的。