convection

简明释义

英[kənˈvekʃn]美[kənˈvekʃn]

n. 〔气体、液体的〕对流；传送

英英释义

单词用法

同义词

反义词

例句

1.The machine circulated hot air by convection.

这个机器使热空气通过对流来循环。

2.If, like now; if, shaking hands can not, do not nod, let us look convection.

如果，就象现在；如果，握手不能，点头不能，就让我们的目光对流。

3.Convection within the red giant dredges the new proto-dust atoms from the core up to the surface.

红巨星内部的对流碰撞出新的原始尘埃原子会从其核心撞到表面。

4.A warm convection flow then lofted it further to between 26, 000 ft and 32, 500 ft, well above cloud level.

然后一股暖气流使其高度更高达到26000英尺和32500英尺之间，几乎到了云层的高度。

5.Another possibility is that the sinking plate cools the neighboring mantle and produces convection currents that move the plates.

另一种可能是下沉的板块冷却了邻近的地幔，并产生对流，使板块移动。

6.Heat can be delivered by convection, radiation, and thermal conduction.

热气可由对流、辐射和热传导来传递。

7.Simple solar dryers, constructed from a wooden frame covered with plastic, let the light in, keep insects out and use natural convection.

这种简单的太阳能干燥装置是用一种覆盖了塑料膜的木架制成的，能够让阳光进入但是挡住了昆虫，而且还利用了自然对流。

8.But as the core cooled, the convection should have eased enough to kill the field.

可随着内核的降温，对流的停止足以让磁场消失。

9.The convection 对流 process in the Earth's mantle affects plate tectonics.

地球地幔中的convection 对流过程影响板块构造。

10.A convection 对流 oven circulates hot air to cook food more evenly.

一个convection 对流烤箱循环热空气，使食物更均匀地烹饪。

11.In weather systems, warm air rises and cool air sinks, creating convection 对流 currents.

在天气系统中，暖空气上升而冷空气下沉，形成convection 对流气流。

12.The heat transfer in a boiling pot of water is primarily due to convection 对流.

在一锅沸水中，热传递主要是由于convection 对流。

13.Many cooking methods rely on convection 对流 to evenly distribute heat.

许多烹饪方法依赖于convection 对流来均匀分配热量。

作文

Convection is a fundamental process that occurs in fluids, encompassing both liquids and gases. It is defined as the transfer of heat through the movement of the fluid itself. When a fluid is heated, it becomes less dense and rises, while cooler, denser fluid sinks. This cycle creates a continuous flow known as convection (对流), which is crucial in various natural phenomena and human-made systems. One of the most common examples of convection (对流) can be observed in boiling water. As the water at the bottom of the pot heats up, it rises to the surface, allowing cooler water to take its place. This process not only distributes heat evenly throughout the pot but also illustrates the principles of convection (对流) in action.In the atmosphere, convection (对流) plays a vital role in weather patterns. Warm air rises, creating areas of low pressure, while cooler air descends, leading to high-pressure areas. This movement of air contributes to wind patterns and influences the formation of clouds and precipitation. For instance, during a hot summer day, the sun heats the land, causing the air above it to warm up and rise. As this air ascends, it can lead to the development of cumulus clouds, which may eventually produce rain if the conditions are right. Understanding convection (对流) is essential for meteorologists as they predict weather changes and phenomena.Moreover, convection (对流) is not limited to natural processes; it is also a key concept in engineering and technology. In heating systems, such as radiators, convection (对流) is utilized to distribute warmth throughout a room. The radiator heats the air directly surrounding it, causing it to rise and allowing cooler air to flow in and be heated in turn. This cycle ensures an even distribution of heat, enhancing comfort in living spaces. Similarly, in cooking, convection (对流) ovens utilize fans to circulate hot air, cooking food more evenly and efficiently. By understanding the principles of convection (对流), chefs can optimize their cooking methods and achieve better results.In the field of oceanography, convection (对流) currents within the ocean play a critical role in regulating global climate. These currents are driven by differences in temperature and salinity, leading to the movement of water masses across vast distances. The Gulf Stream, for example, is a powerful convection (对流) current that transports warm water from the Gulf of Mexico along the eastern coast of the United States and across the Atlantic Ocean to Europe. This current significantly impacts the climate of the regions it flows through, demonstrating the interconnectedness of convection (对流) processes and global weather systems.In conclusion, convection (对流) is a vital mechanism that influences various aspects of our world, from everyday cooking to complex weather patterns and ocean currents. A deeper understanding of convection (对流) allows us to appreciate the natural processes that govern our environment and aids in the development of technologies that improve our lives. As we continue to explore the intricacies of fluid dynamics, the significance of convection (对流) will undoubtedly remain a central topic in both scientific inquiry and practical applications.

对流是液体中发生的基本过程，包括液体和气体。它被定义为通过流体本身的运动进行热量传递。当流体被加热时，它的密度降低并上升，而较冷、密度较大的流体则下沉。这种循环形成了一个连续的流动，称为对流，在各种自然现象和人造系统中至关重要。对流的一个最常见的例子可以在沸水中观察到。当锅底的水加热时，它会上升到表面，允许较冷的水取而代之。这个过程不仅均匀分配锅内的热量，还说明了对流的原理。在大气中，对流在天气模式中发挥着重要作用。暖空气上升，形成低压区域，而较冷的空气下降，导致高压区域。这种空气的运动有助于风的模式，并影响云和降水的形成。例如，在炎热的夏天，阳光加热土地，导致其上方的空气变暖并上升。当这股空气上升时，如果条件合适，就可能导致积云的发展，最终产生降雨。理解对流对于气象学家预测天气变化和现象至关重要。此外，对流不仅限于自然过程；它也是工程和技术中的一个关键概念。在供暖系统中，例如散热器，对流被用来在房间内分配温暖。散热器直接加热周围的空气，使其上升，并允许较冷的空气流入并被加热。这个循环确保了热量的均匀分布，提高了居住空间的舒适度。同样，在烹饪中，对流烤箱利用风扇循环热空气，更均匀和高效地烹饪食物。通过理解对流的原理，厨师可以优化他们的烹饪方法，取得更好的结果。在海洋学领域，海洋中的对流洋流在调节全球气候中发挥着关键作用。这些洋流是由温度和盐度差异驱动的，导致水体在广阔距离上的运动。例如，墨西哥湾流是一股强大的对流洋流，将温暖的水从墨西哥湾沿美国东海岸运输，并穿过大西洋到达欧洲。这股洋流显著影响其流经地区的气候，展示了对流过程与全球天气系统之间的相互联系。总之，对流是影响我们世界各个方面的重要机制，从日常烹饪到复杂的天气模式和洋流。对对流的更深入理解使我们能够欣赏支配我们环境的自然过程，并有助于开发改善我们生活的技术。随着我们继续探索流体动力学的复杂性，对流的重要性无疑将继续成为科学研究和实际应用中的中心话题。