air density

简明释义

空气密度

英英释义

例句

1.Meteorologists often measure air density to predict weather patterns more accurately.

气象学家常常测量空气密度以更准确地预测天气模式。

2.The performance of an aircraft is greatly affected by air density, which can change with altitude and temperature.

飞机的性能受空气密度的影响很大，空气密度会随着高度和温度的变化而变化。

3.At higher altitudes, air density decreases, leading to less lift for airplanes.

在较高的高度，空气密度降低，导致飞机的升力减少。

4.In scuba diving, understanding air density helps divers manage their buoyancy.

在潜水中，理解空气密度有助于潜水员管理浮力。

5.Engine efficiency can be affected by changes in air density during different weather conditions.

不同天气条件下的空气密度变化会影响发动机效率。

作文

Air density is a crucial concept in various fields, including meteorology, aviation, and environmental science. It refers to the mass of air per unit volume, typically expressed in kilograms per cubic meter (kg/m³). The air density (空气密度) varies with altitude, temperature, and humidity, making it an essential factor for understanding weather patterns, flight dynamics, and pollution dispersion.At sea level, the standard air density (空气密度) is approximately 1.225 kg/m³. However, as one ascends in altitude, the air density (空气密度) decreases due to the reduction in atmospheric pressure. This phenomenon is particularly significant for pilots and engineers, as lower air density (空气密度) can impact aircraft performance. For instance, during takeoff and landing, pilots must consider the air density (空气密度) to ensure that their aircraft has enough lift to safely ascend or descend.Temperature also plays a vital role in determining air density (空气密度). Warmer air is less dense than cooler air because the molecules in warm air are more energetic and tend to spread apart. This relationship means that on hot days, the air density (空气密度) is lower, which can affect not only aviation but also the behavior of weather systems. For example, thunderstorms often develop in areas where there is a significant difference in air density (空气密度) due to rising warm air and descending cool air.Humidity is another factor that influences air density (空气密度). When the air contains a high amount of water vapor, the air density (空气密度) decreases because water vapor is lighter than the nitrogen and oxygen molecules it displaces. This aspect is particularly important in meteorology, as changes in humidity can lead to variations in air density (空气密度) that affect wind patterns and precipitation.Understanding air density (空气密度) is also critical for environmental scientists studying air quality and pollution. Pollutants can disperse differently depending on the air density (空气密度), which influences how they travel through the atmosphere. For example, in areas with high air density (空气密度), pollutants may remain closer to the ground, leading to poor air quality and health issues for residents.In conclusion, air density (空气密度) is a fundamental concept that affects many aspects of our daily lives. From aviation safety to weather forecasting and environmental monitoring, understanding the factors that influence air density (空气密度) is essential for professionals in various fields. As we continue to study and understand our atmosphere, the importance of air density (空气密度) will undoubtedly remain a key area of focus, helping us to navigate and mitigate the challenges posed by our changing environment.

空气密度是多个领域中的一个关键概念，包括气象学、航空和环境科学。它指的是单位体积内的空气质量，通常以千克每立方米（kg/m³）表示。空气密度（air density）随高度、温度和湿度的变化而变化，使其成为理解天气模式、飞行动态和污染扩散的重要因素。在海平面上，标准的空气密度（air density）大约为1.225 kg/m³。然而，随着高度的增加，空气密度（air density）因大气压力的降低而减少。这一现象对飞行员和工程师尤为重要，因为较低的空气密度（air density）会影响飞机的性能。例如，在起飞和着陆过程中，飞行员必须考虑空气密度（air density），以确保他们的飞机有足够的升力安全起飞或降落。温度在决定空气密度（air density）方面也起着重要作用。温暖的空气比冷空气的密度低，因为温暖空气中的分子更具活力，倾向于分散开来。这种关系意味着在炎热的日子里，空气密度（air density）较低，这不仅会影响航空，还会影响天气系统的行为。例如，雷暴常常发生在空气密度（air density）存在显著差异的地区，由于上升的暖空气和下降的冷空气之间的相互作用。湿度是另一个影响空气密度（air density）的因素。当空气中含有大量水蒸气时，空气密度（air density）会降低，因为水蒸气比它所取代的氮气和氧气分子轻。这一点在气象学中尤为重要，因为湿度的变化会导致空气密度（air density）的变化，从而影响风的模式和降水。理解空气密度（air density）对于研究空气质量和污染的环境科学家来说也是至关重要的。污染物的扩散方式因空气密度（air density）而异，这影响了它们在大气中的传播。例如，在空气密度（air density）较高的地区，污染物可能更靠近地面，从而导致居民的空气质量较差和健康问题。总之，空气密度（air density）是一个影响我们日常生活许多方面的基本概念。从航空安全到天气预报和环境监测，理解影响空气密度（air density）的因素对各个领域的专业人士来说都是必不可少的。随着我们继续研究和理解我们的气候，空气密度（air density）的重要性无疑将继续成为一个关键关注领域，帮助我们应对和缓解我们不断变化的环境所带来的挑战。