closed-BNC²³⁶²¹³⁺¹ 例句 The steam engine is designed to be a “ closed- loop” system, in which water escaping from the cylinders through the exhaust valves is captured and cooled in a condensing unit. 蒸汽引擎被设计成闭路循环系统。 当从气缸中排出的水蒸汽经过蒸汽阀门时,这样的系统可以将它们截留,然后送进压缩包里冷却。 ecocn