随着NASA宣告航天飞机机队将在执行完最后三次飞行任务后退役，亚特兰蒂斯号于东部时间下午两点二十分在发动机的轰鸣声中拔地而起，飞离濒海发射台。
With NASA bracing for the looming retirement of the shuttle fleet after a final three missions, Atlantis roared to life and rocketed away from its seaside pad at 2:20 p.m. Eastern time.
本文的研究对象，是一台由四气缸母型机变形后的三气缸发动机曲轴圆角设计。
In this paper, we will study a three-cylinder engine which is reformed from a four-cylinder prototype engine.
7风洞是以三台航空发动机为动力的跨音速风洞，通过调节发动机转速、柔壁及旁路活门开度来实现对M数的控制。
FL-7 is a continuous transonic wind tunnel, which is powered by three engines. Mach number is adjusted by the rotating speed of engines, the flexible wall nozzle and the by-pass valve.
本文论述了车用发动机试验台排气系统中的三节扩张式消声坑的设计和试验结果。
In this paper the design and performance of expanding silencing exhaust duct for the test bed of automotive engines are discussed.
当需要考察一台航空发动机的高空性能时，可以利用三种型式的设备，即高空风洞、高空试验台和飞行试验台。
When it becomes necessary to examine the altitude performance of an aircraft engine, three types of facilities may be used-altitude wind tunnels, altitude test beds and flying test beds.
FL - 7风洞是以三台航空发动机为动力的跨音速风洞，通过调节发动机转速、柔壁及旁路活门开度来实现对M数的控制。
FL-7 is a continuous transonic wind tunnel, which is powered by three engines. Mach number is adjusted by the rotating speed of engines, the flexible wall nozzle and the by-pass valve.
FL - 7风洞是以三台航空发动机为动力的跨音速风洞，通过调节发动机转速、柔壁及旁路活门开度来实现对M数的控制。
FL-7 is a continuous transonic wind tunnel, which is powered by three engines. Mach number is adjusted by the rotating speed of engines, the flexible wall nozzle and the by-pass valve.
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