主舱口

例句：

1. 1. The captain had to open the main hatch to let in fresh air.
   船长不得不打开主舱口，让新鲜空气进来。
2. 2. The pilot had to close the main hatch to prevent the plane from crashing.
   飞行员不得不关闭主舱口，以防止飞机坠毁。
3. 3. The crew members were busy working on the main hatch while the passengers waited for their luggage.
   机组人员忙于修理主舱口，而乘客们则在等待他们的行李。