【英语时差8,16】飞机如何平稳飞行？（上）

（单词翻译）

Flying through turbulence¹ in an airplane is usually something of a nuisance; when that fasten-your-seatbelts sign comes on, you know you’re in for a bumpy² ride. On today’s Moment of Science, we’ll learn how airplanes use technology to avoid turbulence in the air ahead, and about systems that can help make flying a smoother, and safer, experience. Much turbulence is “convective turbulence,” and it’s the result of air motion associated with storm clouds. To help detect and avoid convective turbulence, airliners³ use radar⁴, which sends a radio signal ahead of the airplane. If there are raindrops or ice in the air ahead, these radio signals bounce back, letting the pilot know where turbulence might be. A more sophisticated system uses the same radar to determine the motion of the rain and ice particles as well as their location.