pulleys

简明释义

英[ˈpʊliz]美[ˈpʊliz]

n. 滑轮（pulley 的复数）；皮带轮

英英释义

单词用法

同义词

反义词

例句

1.What is the use of pulleys?

滑轮的作用是什么？

2.There are cranks and pulleys, beltings tight or slack.

有曲杆与滑车，还有皮带或紧或松。

3.Levers and pulleys are simple machines.

杠杆和滑轮是简单机械。

4.Pulleys, suspension, circus-like moves and of course, lighting, added to the allure.

滑轮，悬架和像马戏团一样的移动，当然还有灯光，也增加了它的吸引力。

5.The technician there told me my pulleys are not the problem, don't waste money on that.

店里的人跟我说，脚踏车的齿轮没什麽问题，不需要浪费钱。

6.In high school we learned a lot of laws about pulleys and levers used in different ways.

在高中我们已学过许多有关不同用途的滑轮和杠杆的定律。

7.The inline, super-efficient twin-belt drivetrain features oversized pulleys with optimum 1.7 internal ratio.

内嵌，超高效双带特点传动系统过大皮带轮与优化1.7内部的比例。

8.They rigged up a tent-shaped scaffold directly above the tip of the horizontal column, with pulleys suspended from the scaffold's apex.

他们在水平立柱的顶端正上方安装了一个帐篷状的脚手架，在脚手架的顶端悬挂滑轮。

9.The circus performers relied on pulleys to execute their aerial stunts safely.

马戏团表演者依靠滑轮安全地执行他们的空中特技。

10.In physics class, we learned how pulleys can help reduce the amount of force needed to lift an object.

在物理课上，我们学习了如何使用滑轮来减少提升物体所需的力量。

11.The engineer designed a system of pulleys to optimize the lifting process in the factory.

工程师设计了一套滑轮系统，以优化工厂的提升过程。

12.Using pulleys in a sailing system can make it easier to control the sails.

在帆船系统中使用滑轮可以更容易地控制帆。

13.The construction workers used pulleys to lift heavy materials to the top of the building.

建筑工人使用滑轮将重材料提升到建筑物顶部。

作文

In the realm of engineering and mechanics, few inventions have had as profound an impact as the simple yet effective system of pulleys. These devices, which consist of a wheel on an axle or shaft that is designed to support movement and change of direction of force, have been utilized for centuries to make lifting heavy objects easier. The fundamental principle behind pulleys is based on the mechanical advantage they provide, allowing a person to lift a load with less effort than would be required to lift it directly. This characteristic is particularly valuable in construction, shipping, and various industrial applications.The history of pulleys can be traced back to ancient civilizations, where they were used in the construction of monumental structures such as the pyramids of Egypt. Workers employed simple pulleys made of wood to hoist large stone blocks into place, showcasing the ingenuity of early engineering. Over time, the design and materials used for pulleys have evolved, leading to the modern systems we see today, which often incorporate advanced materials like steel and synthetic fibers.One of the most common applications of pulleys is in cranes, which are essential for lifting heavy loads in construction sites. A crane typically uses a combination of pulleys and cables to lift and lower materials. By using multiple pulleys, the crane operator can significantly reduce the amount of force needed to lift a heavy object, making it safer and more efficient. This system not only enhances the lifting capability but also allows for greater precision in positioning loads, which is critical in construction projects.Another interesting application of pulleys can be found in our daily lives, such as in the operation of window blinds. The mechanism that allows us to raise and lower the blinds often employs a simple system of pulleys to manage the tension of the cords. This everyday example demonstrates how pulleys are integrated into various aspects of our lives, often without us even realizing it.In addition to their practical applications, pulleys also serve an educational purpose. In physics classes, students learn about the principles of mechanics through experiments involving pulleys. These experiments help students understand concepts such as force, tension, and mechanical advantage. By manipulating pulleys in a controlled environment, students gain hands-on experience that enhances their comprehension of theoretical principles.Moreover, the advent of technology has led to innovative uses of pulleys in robotics and automation. Engineers are now designing robotic arms that utilize pulleys to perform complex tasks with precision and efficiency. This integration of pulleys into robotics represents a significant advancement in how we approach automation and mechanical design.In conclusion, pulleys are more than just simple mechanical devices; they represent a fundamental principle of physics that has been harnessed for various applications throughout history. From ancient construction techniques to modern robotics, the versatility and effectiveness of pulleys continue to play a crucial role in both industry and everyday life. Understanding how pulleys work not only enriches our knowledge of mechanics but also inspires future innovations in engineering and design.

在工程和机械领域，很少有发明像简单而有效的滑轮系统那样产生深远的影响。这些设备由一个轮子和一个轴或轴承组成，旨在支持力的运动和方向变化，几个世纪以来，它们被用来使重物的提升变得更容易。滑轮背后的基本原理是它们提供的机械优势，使人们可以用比直接提升重物所需的更少的力量来提升负载。这一特性在建筑、运输和各种工业应用中尤为重要。滑轮的历史可以追溯到古代文明，当时它们被用于建造如埃及金字塔等宏伟结构。工人们使用简单的木制滑轮将大型石块吊起，展示了早期工程的独创性。随着时间的推移，滑轮的设计和材料不断演变，导致我们今天看到的现代系统，这些系统通常采用钢和合成纤维等先进材料。滑轮最常见的应用之一是在起重机中，起重机对于在建筑工地上提升重物至关重要。起重机通常使用一组滑轮和电缆来提升和降低材料。通过使用多个滑轮，起重机操作员可以显著减少提升重物所需的力量，从而使其更加安全和高效。该系统不仅增强了提升能力，还允许更精确地定位负载，这在建筑项目中至关重要。滑轮的另一个有趣应用可以在我们的日常生活中找到，例如在窗帘的操作中。允许我们升降窗帘的机制通常采用简单的滑轮系统来管理绳索的张力。这个日常例子展示了滑轮如何融入我们生活的各个方面，往往在我们甚至没有意识到的情况下。除了其实用应用外，滑轮还具有教育意义。在物理课上，学生通过涉及滑轮的实验学习力学原理。这些实验帮助学生理解力、张力和机械优势等概念。通过在受控环境中操纵滑轮，学生获得了增强他们对理论原则理解的实践经验。此外，科技的出现使得滑轮在机器人和自动化中的创新应用成为可能。工程师们现在正在设计利用滑轮执行复杂任务的机器人手臂。这种将滑轮融入机器人技术的整合，代表了我们在自动化和机械设计方面的重大进步。总之，滑轮不仅仅是简单的机械设备；它们代表了一种物理基本原理，这一原理在历史上被用于各种应用。从古代建筑技术到现代机器人，滑轮的多功能性和有效性继续在工业和日常生活中发挥着至关重要的作用。理解滑轮的工作原理不仅丰富了我们对力学的知识，也激励着未来在工程和设计方面的创新。