burr holes of skull

例句：

1. 1. The detective found a burr holein the wall that led to the basement.
   侦探在墙上发现了一个通向地下室的洞。
2. 2. The scientist discovered a burr holein the rock formation that could be usedas a ventilation system.
   科学家在岩石构造中发现了可以用作通风系统的洞。
3. 3. The engineer had to repair the burr hole in the roof to prevent waterleakage.
   工程师不得不修理屋顶上的洞，以防止漏水。