inferior perforated spot

例句：

1. 1. The defective part of the machine was an inferior perforation.
   机器的缺陷部分是一个劣等穿孔。
2. 2. The researcher found an inferior perforation in the sample.
   研究员在样本中发现了劣等穿孔。
3. 3. Due to the inferior perforation, the device failed to function properly.
   由于劣等穿孔，该设备无法正常工作。