航天飞机的这个有关其氢排气系统的机械问题，首次是在三月份在初次试图发射“发现号”航天飞机期间出现的。
The shuttle's mechanical problem with its hydrogen venting system first cropped up in March during an initial attempt to launch space shuttle Discovery.
为改进效率，在部分负荷期间将排气动力回收涡轮 机（3）断开。
To improve performance, the exhaust-gas power recovery turbine (3) is decoupled during partial-load operation.
应用推荐