tweendeck bulkhead

例句：

1. 1. The ship has a tweendeck for passengers and crew.
   这艘船有一个双层甲板供乘客和船员使用。
2. 2. The captain's quarters are on the tweendeck.
   船长的办公室在双层甲板上。
3. 3. The passengers were given access to the tweendeck during the voyage.
   在这次航行中，乘客们被允许进入双层甲板。