unpowered [ʌn'paʊəd]

例句:

• The big downside of the WGT is the USB2.0 port is entirely completely unpowered.
  来自ENGADGET
• An autogiro is supported in flight by unpowered rotating wings.
  旋翼机在飞行中是靠无动力旋转式机翼来支持的.
  
• Having little wind, this area greatly affects unpowered ships.
  有微风的时候, 这个区域非常容易影响无动力航船.
  
• A man without aspirations is like an unpowered boat which has to go with the waves.
  没有志向的人,就好比没有动力的船,只能随波逐流.