downdraught

简明释义

英[ˈdaʊndrɑːft]美[ˈdaʊndræft]

n. 倒灌风；[车辆] 下吸；向下气流

英英释义

单词用法

同义词

反义词

例句

1.To land a chopper safely in the dirt requires sophisticated laser scanners to detect obstacles hidden by dust thrown up by the downdraught of the rotors.

为了使直升机在尘土中安全地着陆需要复杂的激光扫描仪去探测被旋翼的倒灌气流扬起的灰尘所隐藏的障碍物。

2.To land a chopper safely in the dirt requires sophisticated laser scanners to detect obstacles hidden by dust thrown up by the downdraught of the rotors.

为了使直升机在尘土中安全地着陆需要复杂的激光扫描仪去探测被旋翼的倒灌气流扬起的灰尘所隐藏的障碍物。

3.The pilot had to adjust the altitude due to a sudden downdraught 下沉气流 that caused the plane to drop unexpectedly.

由于突然出现的downdraught 下沉气流，飞行员不得不调整高度，导致飞机意外下降。

4.During the storm, the downdraught 下沉气流 made it difficult for the firefighters to control the flames.

在暴风雨期间，downdraught 下沉气流使消防员难以控制火焰。

5.The meteorologist explained how the downdraught 下沉气流 contributes to thunderstorms.

气象学家解释了downdraught 下沉气流是如何促进雷暴形成的。

6.Hikers should be cautious of downdraughts 下沉气流 when walking near cliffs or steep areas.

徒步旅行者在悬崖或陡峭地区行走时应小心downdraughts 下沉气流。

7.The downdraught 下沉气流 from the mountain can create turbulent conditions for gliders.

山上的downdraught 下沉气流会为滑翔机创造动荡的飞行条件。

作文

In the study of meteorology, understanding various atmospheric phenomena is crucial for predicting weather patterns and ensuring safety during flights. One such phenomenon is the downdraught, which refers to a downward current of air that can significantly affect both weather conditions and aviation. The downdraught can occur in various situations, but it is most commonly associated with thunderstorms. When warm, moist air rises rapidly in a storm, it can create an imbalance in the atmosphere. As this warm air ascends, cooler air from above may rush downwards, creating a powerful downdraught. This downward movement of air can lead to severe weather conditions, including strong winds and heavy rainfall. The impact of a downdraught is particularly significant for pilots. When flying through or near thunderstorms, pilots must be aware of the potential for sudden and intense downdraughts. These air currents can cause abrupt changes in altitude and can make flying extremely challenging. For instance, if an aircraft encounters a strong downdraught, it may experience a rapid loss of altitude, which can be dangerous if not managed properly. Consequently, pilots are trained to recognize signs of downdraughts and adjust their flight paths accordingly to avoid turbulent areas. In addition to aviation, downdraughts also play a role in the formation of certain weather phenomena. For example, they can contribute to the development of microbursts, which are localized and intense downdrafts that can cause severe wind shear. Microbursts can be extremely hazardous for aircraft during takeoff and landing, making it essential for meteorologists to monitor conditions that could lead to their formation. Understanding the dynamics of a downdraught helps meteorologists predict these occurrences and issue timely warnings to pilots and the public. Moreover, downdraughts can influence the environment in other ways. They can lead to the cooling of surface temperatures as cooler air descends, impacting local ecosystems and weather patterns. For instance, after a thunderstorm, the presence of a downdraught can result in a sudden drop in temperature, which can affect plant and animal life in the area. This cooling effect can also lead to the formation of fog and other weather phenomena that can alter visibility and impact transportation. In conclusion, the concept of a downdraught is vital for understanding both meteorology and aviation safety. By being aware of the characteristics and effects of downdraughts, pilots can navigate more safely through turbulent weather, while meteorologists can provide better forecasts and warnings. As we continue to study our atmosphere, the significance of downdraughts will remain an important aspect of weather science, influencing not only flight safety but also our broader understanding of climate and environmental changes.

在气象学的研究中，理解各种大气现象对于预测天气模式和确保飞行安全至关重要。其中一种现象是downdraught，指的是向下的空气流动，这种流动会显著影响天气条件和航空。downdraught可以在多种情况下发生，但最常与雷暴有关。当温暖潮湿的空气在暴风雨中迅速上升时，它可能会在大气中造成不平衡。随着这股温暖空气的上升，来自上方的冷空气可能会急速向下冲，形成强大的downdraught。这种向下的空气流动可能导致严重的天气条件，包括强风和大雨。 downdraught的影响对飞行员尤其重要。在雷暴中或附近飞行时，飞行员必须意识到突然和强烈的downdraught的潜在风险。这些气流可能导致高度的突然变化，使飞行变得极具挑战性。例如，如果一架飞机遇到强烈的downdraught，可能会经历快速的高度损失，这在没有妥善管理的情况下可能是危险的。因此，飞行员接受过识别downdraught迹象的训练，并相应调整航线以避免湍流区域。 除了航空之外，downdraught在某些天气现象的形成中也发挥着作用。例如，它们可能促成微爆的形成，微爆是一种局部和强烈的下沉气流，可能导致严重的风切变。微爆在起飞和着陆期间对飞机极具危险，因此气象学家必须监测可能导致它们形成的条件。理解downdraught的动态有助于气象学家预测这些事件并及时向飞行员和公众发出警告。 此外，downdraught还可以以其他方式影响环境。它们可以导致地表温度的降低，因为冷空气下沉，影响当地生态系统和天气模式。例如，在雷暴之后，downdraught的存在可能导致温度的突然下降，这可能影响该地区的植物和动物生活。这种降温效应还可能导致雾和其他天气现象的形成，这会改变能见度并影响交通。 总之，downdraught的概念对理解气象学和航空安全至关重要。通过了解downdraught的特征和影响，飞行员可以更安全地穿越动荡的天气，而气象学家可以提供更好的预测和警告。随着我们继续研究大气，downdraught的重要性将始终是天气科学的一个重要方面，不仅影响飞行安全，还影响我们对气候和环境变化的更广泛理解。