lever

简明释义

英[ˈliːvə(r)]美[ˈlevər]

n. （车辆或机器的）操纵杆，控制杆；杠杆；（用于达到某一目的的）手段，方法

v. （用杠杆）撬动；挤走（某人）；（均衡地用力）移动；把……作为杠杆

【名】 （Lever）（英）利弗，（法）勒韦，（德）莱韦尔（人名）

英英释义

单词用法

同义词

反义词

例句

1.He examined the machine, worked a lever that lifted the lid.

他检查了机器，并使用杠杆打开盖子。

2.This lever is unlimited growth.

这根杠杆就是无限成长。

3.The lever gets them out of the box, but after more and more trials, they stopped scratching at the bars and pushing at the ceiling.

杠杆让它们出了盒子，但在越来越多的尝试之后，它们不再抓栏杆和推天花板。

4.The threat of sanctions is our most powerful lever for peace.

实施制裁的威胁是我们争取和平最有力的施压手段。

5.The device itself was right under the vehicle, almost in line with the gear lever.

这个装置本身就在车子下面，几乎与换挡杆成一直线。

6.Next, the researchers trapped the robots in cages and gave the rats the opportunity to release them by pressing a lever.

接下来，研究人员将机器老鼠困在笼子里，让老鼠有机会按下杠杆来释放它们。

7.He used a lever to lift the heavy rock.

他用一个杠杆来抬起那块重石头。

8.The mechanic adjusted the lever to change the gear.

机械师调整了杠杆以换挡。

9.You can pull the lever to start the machine.

你可以拉动杠杆来启动机器。

10.The child learned how to use a lever in his science class.

这个孩子在科学课上学会了如何使用杠杆。

11.A lever can make it easier to lift heavy objects.

一个杠杆可以使抬起重物变得更容易。

作文

In the realm of physics and engineering, the concept of a lever (杠杆) is fundamental. A lever is a simple machine that amplifies an input force to lift or move an object more easily. It consists of a rigid beam that pivots around a fixed point known as the fulcrum. The beauty of a lever lies in its ability to enable us to exert a smaller force over a greater distance to achieve the same work done by a larger force over a shorter distance. This principle can be observed in various everyday applications, from lifting heavy objects to using tools like crowbars and seesaws. To illustrate how a lever functions, consider a seesaw on a playground. When one child sits on one end of the seesaw, their weight creates a downward force. If another child sits further away from the fulcrum on the opposite side, they can balance the seesaw even if they weigh less. This is because the distance from the fulcrum plays a crucial role in the effectiveness of the lever. The farther away a person sits, the less weight they need to counterbalance the heavier child. This simple yet powerful mechanism is a perfect example of how levers work in our daily lives. The principles of levers are not only practical but also deeply embedded in various fields such as construction, mechanics, and even biology. For instance, in construction, cranes utilize the concept of a lever to lift heavy materials to great heights. By adjusting the position of the fulcrum and the length of the arm, operators can maximize the lifting capacity of the crane with minimal effort. Similarly, our muscles act as biological levers when we perform physical activities. The bones in our body serve as the rigid beams, the joints act as fulcrums, and the muscles provide the necessary force to move our limbs. In addition to its physical applications, the term lever has also found its way into the world of finance and business. In this context, leverage refers to the use of borrowed capital to increase the potential return on investment. Companies often use financial levers to amplify their profits, albeit with increased risk. This strategic use of levers can lead to significant growth opportunities; however, it requires careful management to avoid potential pitfalls. Moreover, the concept of a lever can be metaphorically applied in various aspects of life. For example, education can be seen as a lever that empowers individuals to achieve their goals. By acquiring knowledge and skills, one can leverage their abilities to create better opportunities for themselves. Similarly, networking can act as a lever in a professional setting, where building relationships can open doors to new career advancements. In conclusion, the lever (杠杆) is an essential tool in both the physical and metaphorical sense. Its applications span across various disciplines, demonstrating its versatility and importance. Understanding how to effectively utilize a lever, whether in lifting heavy objects, maximizing business potential, or enhancing personal growth, can significantly impact our lives. As we continue to explore the principles of levers, we unlock new possibilities and learn to navigate the challenges we face with greater ease and efficiency.

在物理和工程领域，lever（杠杆）的概念是基础的。lever是一种简单的机械装置，它放大输入力，以更轻松地抬起或移动物体。它由一根刚性梁组成，该梁围绕一个称为支点的固定点旋转。lever的美在于，它使我们能够在更长的距离上施加较小的力，以实现与在较短的距离上施加较大力量相同的工作。这一原理可以在各种日常应用中观察到，从举起重物到使用撬棍和跷跷板等工具。 为了说明lever的功能，可以考虑游乐场上的跷跷板。当一个孩子坐在跷跷板的一端时，他们的重量产生向下的力量。如果另一个孩子坐在支点的另一侧更远的地方，他们可以平衡跷跷板，即使他们的体重较轻。这是因为离支点的距离在lever的有效性中起着至关重要的作用。一个人坐得越远，他们需要的对抗较重孩子的重量就越少。这个简单而强大的机制是我们日常生活中杠杆工作完美的例子。 杠杆原理不仅实用，而且深深植根于建筑、机械甚至生物学等各个领域。例如，在建筑中，起重机利用lever的概念将重物提升到很高的地方。通过调整支点的位置和臂的长度，操作员可以用最小的努力最大化起重机的提升能力。同样，当我们进行身体活动时，我们的肌肉充当生物学上的lever。我们身体中的骨头作为刚性梁，关节作为支点，肌肉提供必要的力量来移动我们的四肢。 除了物理应用之外，lever一词也进入了金融和商业领域。在这种情况下，杠杆指的是使用借入资本来增加投资的潜在回报。公司通常使用财务levers来放大他们的利润，尽管风险也随之增加。这种战略性使用levers可以带来显著的增长机会；然而，它需要谨慎管理以避免潜在的陷阱。 此外，lever的概念在生活的各个方面也可以隐喻地应用。例如，教育可以被视为一种lever，使个人能够实现他们的目标。通过获得知识和技能，人们可以利用自己的能力创造更好的机会。同样，建立关系网络可以在专业环境中充当lever，通过建立关系可以为新的职业发展打开大门。 总之，lever（杠杆）在物理和隐喻意义上都是一种基本工具。它的应用跨越多个学科，展示了其多功能性和重要性。理解如何有效利用lever，无论是在举起重物、最大化商业潜力还是增强个人成长方面，都可以显著影响我们的生活。随着我们继续探索杠杆的原则，我们解锁了新的可能性，并学习以更大的轻松和效率应对面临的挑战。