pulley

简明释义

英[ˈpʊli]美[ˈpʊli]

n. 滑轮；皮带轮；滑车

vt. 用滑轮升起

n. （Pulley）人名；（英）普利

复 数 p u l l e y s

第 三 人 称 单 数 p u l l e y s

现 在 分 词 p u l l e y i n g

过 去 式 p u l l e y e d

过 去 分 词 p u l l e y e d

英英释义

单词用法

同义词

反义词

例句

1.Uncle took the rod and kept wave pulley, receive from time to time a good fishing rod, let the hook tightly in his mouth.

叔叔拿起鱼竿，不停地摇滑轮，时不时地还收几下鱼竿，好让钩子紧紧地钩在与嘴上。

2.We want to use this pulley.

我们需要使用这个滑车。

3.Remove water pump belt pulley.

拆下水泵皮带轮。

4.Thee 'Top Chain' requires no tensioner pulley due to the eccentric Bottom Bracket.

在'顶链'不要求拉紧滑轮由于偏心中轴。

5.The chain, pulley, shaft, belt and other running parts should be equipped with protective cover and protective board.

设备上的链条、皮带轮、轴、皮带及其他运转部分都应该设置上防护罩和防护板。

6.Put the V belt on the pulley of the sewing machine.

首先把v 形皮带挂到缝纫机皮带轮上。

7.Fasten the pulley and the support block to your worktable.

拴紧对你的工作台的滑车和支承区块。

8.In the gym, you can see a pulley system that helps with weight training exercises.

在健身房，你可以看到一个滑轮系统，帮助进行力量训练。

9.He explained how a pulley can reduce the effort needed to lift a load.

他解释了如何通过一个滑轮来减少提升负载所需的力量。

10.The old clock was powered by a series of pulleys that moved its hands.

这座古老的钟表由一系列滑轮驱动其指针。

11.They installed a pulley in the tree to help raise the flag.

他们在树上安装了一个滑轮来帮助升旗。

12.The construction workers used a pulley to lift heavy materials to the top of the building.

建筑工人使用一个滑轮将重物提升到建筑物的顶部。

作文

The concept of a pulley (滑轮) is fundamental in the field of mechanics and engineering. A pulley consists of a wheel on an axle or shaft that is designed to support movement and change of direction of force using a rope or cable. This simple machine can significantly reduce the amount of force needed to lift heavy objects, making it an essential tool in construction, transportation, and many other industries.In everyday life, we encounter pulleys in various forms. For instance, think about the flagpole in your schoolyard. When you raise or lower the flag, you are using a pulley system. The rope that you pull runs over the wheel at the top of the pole, allowing you to lift the flag with much less effort than if you were trying to lift it straight up by hand. This is a practical demonstration of how pulleys work by changing the direction of the force applied.Another common example of a pulley is found in gym equipment, such as cable machines. These machines often utilize multiple pulleys to allow users to perform various exercises. The pulleys help to distribute weight and provide a smoother motion, enabling users to focus on their workout without struggling with heavy weights. This illustrates not only the versatility of pulleys but also their importance in promoting safety and efficiency in physical training.In construction, pulleys are vital for lifting materials to great heights. Cranes, for example, often incorporate complex pulley systems to hoist heavy loads. By using a combination of fixed and movable pulleys, cranes can lift incredibly heavy objects with relatively little force applied by the operator. This capability is crucial for building skyscrapers and bridges, where materials need to be transported to high elevations.Moreover, pulleys are not just limited to large-scale operations; they can also be found in household items. For example, many window blinds operate using a pulley mechanism. When you pull the cord, the pulley system allows the blinds to raise or lower smoothly, demonstrating how this simple machine can enhance our everyday lives.Understanding the mechanics behind a pulley is essential for students studying physics and engineering. The principles of force, tension, and mechanical advantage come into play when analyzing how pulleys function. By studying these concepts, students can appreciate the elegance of simple machines and how they can be combined to create more complex systems.In conclusion, the pulley (滑轮) is a remarkable invention that has stood the test of time. Its ability to make lifting easier and safer has made it indispensable in various fields, from construction to fitness. As we continue to innovate and improve technology, the basic principles behind pulleys remain relevant, reminding us of the power of simplicity in engineering. Whether you are raising a flag, working out at the gym, or constructing a building, pulleys play a crucial role in our daily lives, showcasing the importance of understanding and utilizing simple machines effectively.

滑轮的概念在机械和工程领域中是基础性的。滑轮由一个轮子和一个轴或轴承组成，旨在通过使用绳索或电缆支持运动和改变力的方向。这种简单的机器可以显著减少提升重物所需的力量，使其成为建筑、运输和许多其他行业的重要工具。在日常生活中，我们以各种形式遇到滑轮。例如，想想你学校操场上的旗杆。当你升起或降下国旗时，你正在使用滑轮系统。你拉动的绳子穿过杆顶的轮子，使你能够用比单靠手直接抬起国旗更少的力气来升起国旗。这是滑轮如何通过改变施加的力量方向来工作的实际演示。另一个常见的滑轮例子可以在健身器材中找到，例如有线机器。这些机器通常利用多个滑轮来让用户进行各种锻炼。滑轮帮助分配重量并提供更平滑的运动，使用户能够专注于锻炼，而不必与重物作斗争。这不仅展示了滑轮的多功能性，还突出了它们在促进安全和效率方面的重要性。在建筑中，滑轮对于将材料提升到高处至关重要。例如，起重机通常结合复杂的滑轮系统来提升重物。通过使用固定和活动滑轮的组合，起重机可以用相对较小的操作力提升极重的物体。这种能力对于建造摩天大楼和桥梁至关重要，因为材料需要被运输到高处。此外，滑轮不仅限于大规模操作；它们也可以在家庭用品中找到。例如，许多窗帘通过滑轮机制运作。当你拉动绳索时，滑轮系统使窗帘能够平稳升降，展示了这种简单机器如何提升我们的日常生活。了解滑轮背后的机械原理对于学习物理和工程的学生来说至关重要。在分析滑轮的功能时，力、张力和机械优势的原理都会发挥作用。通过研究这些概念，学生可以欣赏简单机器的优雅，以及如何将它们组合起来创造更复杂的系统。总之，滑轮是一项了不起的发明，经受住了时间的考验。它使提升变得更容易和安全的能力，使其在各个领域中不可或缺，从建筑到健身。随着我们继续创新和改善技术，滑轮背后的基本原理仍然相关，提醒我们在工程中简单性的重要性。无论你是在升起国旗、在健身房锻炼，还是在建造建筑，滑轮在我们的日常生活中都发挥着至关重要的作用，展示了有效理解和利用简单机器的重要性。