窥视孔

例句：

1. 1. The engineer had to fix the cockpit's visor to prevent any potential leaks.
   工程师不得不修理驾驶舱的窥视孔以防止任何潜在的泄漏。
2. 2. The spy hole was too small for him to see through.
   这个窥视孔太小了，他无法透过看。
3. 3. The ship's captain kept a lookout for any unusual activity in the area.
   船长保持警惕，注意该地区的任何异常活动。