【英语时差8,16】飞机如何平稳飞行？（下）

Turbulence¹ is characterized by winds moving at different speeds. If the airborne particles are moving in wildly different directions in one region, but moving in unison² in another, the pilot will have a much better sense of exactly where the most severe turbulence is. Another system is needed to detect so-called “clear air” turbulence, or turbulence not associated with storm clouds. Researchers have developed a system that shoots an infrared³ laser beam ahead of the plane. This works like the radar⁴, bouncing off airborne particles and measuring their motion, but it is sensitive enough to measure the motion of tiny dust particles from miles away. Some particles exist even in the cleanest air, so this system would help detect any kind of turbulence, which might make flying a whole lot smoother.

1 turbulence   

n.喧嚣，狂暴，骚乱，湍流

参考例句：

• The turbulence caused the plane to turn over.空气的激流导致飞机翻转。
• The world advances amidst turbulence.世界在动荡中前进。

2 unison   

n.步调一致，行动一致

参考例句：

• The governments acted in unison to combat terrorism.这些国家的政府一致行动对付恐怖主义。
• My feelings are in unison with yours.我的感情与你的感情是一致的。

3 infrared   

adj./n.红外线(的)

参考例句：

• Infrared is widely used in industry and medical science.红外线广泛应用于工业和医学科学。
• Infrared radiation has wavelengths longer than those of visible light.红外辐射的波长比可见光的波长长。

4 radar   

n.雷达，无线电探测器

参考例句：

• They are following the flight of an aircraft by radar.他们正在用雷达追踪一架飞机的飞行。
• Enemy ships were detected on the radar.敌舰的影像已显现在雷达上。