Virgin Galactic, which is the main tenant there, completed an unpowered flight of its SpaceShipTwo vehicle.
太空港的主要承租方维珍银河公司完成了其“宇宙飞船二号”飞行器的无动力飞行测试。
The World From A to Z
The Wright brothers had been flying airplanes for years, but at the time, this was the longest flight in an unpowered glider.
莱特兄弟多年来一直在驾驶飞机,但在当时,这是无动力滑翔机最长的飞行。
VOA Standard 2015年4月合集
Wearing the unpowered ankle exoskeleton can help people either walk farther with the same amount of energy, or restore the normal movement pattern for people who have trouble walking.
On earth, or Venus, or Titan, there's enough air that you can land largely unpowered, first by slowing down with a heat shield and atmospheric drag, and then with parachutes.