第三人称单数：engine rooms
1. 机舱：15. afterpeak tank: 尾尖舱 | 16. engine room: 机舱 | 17. collision bulkhead:防撞舱壁
2. 发动机舱：Engine retarder 发动机缓速装置 | Engine room 发动机舱 | Engine room lamp 发动机舱照明灯
3. 轮机舱：deck 甲板 | engine room 轮机舱 | figurehead 破浪神,船首饰
\u0077\u0077\u0077\u002e\u0071\u0069\u0063\u0061\u0069\u002e\u006e\u0065\u0074
1. 轮机舱
On a boat or a ship, the engine room is the place where the engines are.
2. （组织、机构等的）最重要部分，最有影响力部分
If you refer to something as the engine room of an organization or institution, you mean it is the most important or influential part of that organization or institution.
e.g. These firms are regarded as the engine room of the British economy.
这些公司被认为是英国经济至关重要的组成部分。