the part of a ship where the engines are （船舶）机舱 There was a fire in the engine room. 机舱起火。 the ship's engine room 船的发动机房
the part of an organization where most of the important activity takes place or important decisions are made （机构的）决策部门 The Madrid office is the engine room of the company. 马德里办事处是公司的机房。