periscope [ˈperɪskoʊp]

例句:

• The captain aligned the periscope on the bearing.
  船长使潜望镜对准方位。
  来自辞典例句
• The captain of the submarine has got this periscope thing.
  那个潜艇艇长有个类似于潜望镜之类的东西.
  
• Now, peering through the periscope he remarked in businesslike tones.
  现在, 他一面从潜望镜里观察,一面用精干踏实的口吻说话.
  
• He played with a periscope on the top of his head; always scanning the pitch.
  来自BBC
• Turn the 'far' end of the periscope down so it sticks out to the side away from the other eye, while still looking forward.
  来自SA
• The greater the distance to the object, the wider the periscope system should be.
  来自SA