pintle hole

例句：

1. 1.The scientist found a pinhole in the wall that led to a hidden room.
   科学家在墙上发现了一个针孔，通向一个隐藏的房间。
2. 2.The pinhole was too small to see through.
   这个针孔太小了，看不清楚。
3. 3.The pinhole was used to create a tiny window for observation.
   这个针孔被用来创造一个小窗口进行观察。