propulsion

简明释义

英[prəˈpʌlʃ(ə)n]美[prəˈpʌlʃn]

n. 推进；推进力

英英释义

单词用法

同义词

反义词

例句

1.So far NASA is exploring two options for propulsion there? A nuclear thermal rocket and a chemical engine.

迄今为止NASA研究了两种前往那里的备选推进器：核热火箭和化学发动机。

2.Each SPHERE satellite comprises functionality for power, propulsion, computing, and navigation.

每个SPERES卫星可提供能源、推进、计算和导航功能。

3."Electric propulsion has a lot of benefits over internal combustion engines," he said.

他说：“电力推进相对内燃发动机来说有很多好处。”

4.Cerf has been working with NASA's Pasadena Jet Propulsion Laboratory—the people behind the recent Mars expedition—to design what he calls an "interplanetary Internet protocol."

瑟夫一直在与美国宇航局的帕萨迪纳喷气推进实验室（最近火星探测的幕后人员）合作，设计他所说的“星际互联网协议”。

5.The work at Cornell is testing hypotheses of insect propulsion and control.

在康奈尔大学的工作是测试昆虫的推进力和可控性。

6.Scientists and engineers are beginning to study this ability of fishes in the hope of designing more efficient propulsion systems for ships.

科学家和工程师们开始研究鱼类的这种能力，希望能设计出更有效的船舶推进系统。

7.Their high, narrow tails with swept-back tips are almost perfectly adapted to provide propulsion with the least possible effort.

它们又长又细的尾巴配合后掠式的襟翼，完美地适用于最省力的方式提供推动力。

8.The drive wheels then rotate as necessary, to achieve both balance and propulsion.

然后驱动轮按需转动，同时实现平衡和推进。

9.The propulsion 推进 of the spacecraft is crucial for reaching Mars.

航天器的推进对于到达火星至关重要。

10.Electric motors are becoming more common in propulsion 推进 systems for boats.

电动马达在船只的推进系统中变得越来越普遍。

11.The new rocket uses a hybrid engine for its propulsion 推进 system.

这款新火箭使用混合发动机作为其推进系统。

12.Modern submarines rely on nuclear power for propulsion 推进 underwater.

现代潜艇依靠核能在水下进行推进。

13.The engineer explained how the propulsion 推进 system of the aircraft works.

工程师解释了飞机的推进系统是如何工作的。

作文

The concept of propulsion is fundamental to the fields of engineering and physics, particularly in the design and operation of vehicles and machinery. In simple terms, propulsion refers to the mechanism or force that drives an object forward. This can be observed in various contexts, from the engines of airplanes to the motors of boats, and even in the way that rockets are launched into space. Understanding the principles of propulsion not only helps us appreciate the technology behind transportation but also sheds light on the scientific principles that govern motion.In aviation, for instance, the propulsion system is crucial for flight. Airplanes utilize jet engines that generate thrust by expelling air at high speeds. This thrust counteracts the weight of the aircraft and allows it to ascend into the sky. The efficiency of these engines is vital for ensuring that flights are both economical and environmentally friendly. Engineers constantly work on improving propulsion technologies, seeking ways to reduce fuel consumption and emissions while maintaining performance. One of the most exciting developments in this area is the exploration of electric propulsion systems, which hold the potential to revolutionize air travel.In marine applications, propulsion systems can vary widely. Traditional boats often rely on internal combustion engines, while modern vessels might utilize more advanced technologies such as water jets or electric motors. Each type of propulsion has its advantages and disadvantages, influencing factors like speed, maneuverability, and environmental impact. For example, electric motors provide a quieter and cleaner alternative, but they may not yet match the power output of conventional engines for larger ships.The realm of space exploration presents perhaps the most fascinating examples of propulsion. Rockets operate on the principle of Newton's third law of motion: for every action, there is an equal and opposite reaction. When a rocket expels gas out of its engines, it experiences a thrust that propels it upwards. This method of propulsion is essential for overcoming Earth's gravitational pull and reaching orbit. Scientists and engineers are continuously researching new types of rocket propulsion, including ion drives and nuclear thermal engines, which promise to expand our capabilities for deep space travel.Moreover, the study of propulsion extends beyond just vehicles. It encompasses the understanding of fluid dynamics, thermodynamics, and material science. Each of these disciplines plays a role in optimizing propulsion systems, ensuring they are safe, efficient, and capable of performing under various conditions. As technology advances, we can expect to see innovations that will further enhance our ability to travel across land, sea, and space.In conclusion, propulsion is a key concept that drives many aspects of modern technology and transportation. From airplanes soaring through the skies to rockets exploring the cosmos, understanding propulsion allows us to appreciate the complexities of movement and the scientific principles that make it possible. As we continue to innovate and seek sustainable solutions, the future of propulsion holds exciting possibilities that could transform how we navigate our world and beyond.

‘推进’的概念是工程和物理学领域的基础，尤其是在车辆和机械的设计与操作中。简单来说，‘推进’指的是推动物体向前的机制或力量。这可以在各种情况下观察到，从飞机的引擎到船只的马达，甚至在火箭发射到太空的方式中。理解‘推进’的原理不仅有助于我们欣赏交通技术，还能揭示支配运动的科学原理。例如，在航空领域，‘推进’系统对飞行至关重要。飞机利用喷气发动机，通过高速排出空气来产生推力。这种推力抵消了飞机的重量，使其能够升空。这些引擎的效率对于确保航班既经济又环保至关重要。工程师们不断致力于改善‘推进’技术，寻求减少燃料消耗和排放的方法，同时保持性能。在这一领域，最令人兴奋的发展之一是电动推进系统的探索，这有可能彻底改变航空旅行。在海洋应用中，‘推进’系统可能会有很大不同。传统船只通常依赖内燃机，而现代船只可能利用更先进的技术，如水喷射器或电动马达。每种类型的‘推进’都有其优缺点，影响速度、机动性和环境影响等因素。例如，电动马达提供了更安静、更清洁的替代方案，但对于较大的船只，它们的功率输出可能尚未达到传统引擎的水平。太空探索领域或许呈现了‘推进’最迷人的例子。火箭基于牛顿第三运动定律的原理：每个动作都有一个相等且相反的反应。当火箭从其引擎中排出气体时，它会经历一种推力，将其向上推进。这种‘推进’方法对于克服地球的引力并达到轨道至关重要。科学家和工程师们不断研究新型火箭‘推进’，包括离子驱动和核热发动机，这些都承诺扩展我们深空旅行的能力。此外，对‘推进’的研究不仅限于车辆。它还包括流体动力学、热力学和材料科学的理解。这些学科中的每一个都在优化‘推进’系统方面发挥着作用，确保它们在各种条件下安全、高效且能够执行任务。随着技术的进步，我们可以期待看到进一步增强我们在陆地、海洋和太空中旅行能力的创新。总之，‘推进’是驱动现代技术和交通许多方面的关键概念。从飞翔在天空中的飞机到探索宇宙的火箭，理解‘推进’使我们能够欣赏运动的复杂性及其可能性。随着我们不断创新和寻求可持续的解决方案，‘推进’的未来将蕴藏着激动人心的可能性，可能会改变我们如何在世界及其之外进行导航。