pinhole [ˈpɪnhoʊl]

例句:

• The calomel electrode has a small pinhole opening or wick.
  甘汞电板上有一个针孔或砂芯.
  
• He then shines a narrow beam in horizontally through the pinhole.
  然后他通过小孔水平地射入一窄光束.
  
• Pinhole on shot - hole damage is never structurally significant.
  针孔和蛀洞所造成的危害对结构的影响不大.
  
• The tinfoil with the pinhole should fix this problem.
  来自SA