舱室小孔

例句：

1. 1. The cabin had a small window for ventilation.
   这个舱室有一个小窗户用于通风。
2. 2. The pilot used the small hole to check the altitude.
   飞行员用这个小孔来检查高度。
3. 3. The engineer found a small crack in the wall that could be sealed with a patch.
   工程师发现墙上有一道小裂缝，可以用补丁封住。