Skylab was the first U. S. space station, and the astronauts would need to know if a fire had started or if noxious gases were loose in the vehicle.
Skylab是美国第一个空间实验室，当火灾发生时或者有害气体发生泄漏时，宇航员需要立刻做出反应。
Skylab was the first U. S. space station, and the astronauts would need to know if a fire had started or if noxious gases were loose in the vehicle.
Skylab是美国第一个空间实验室，当火灾发生时或者有害气体发生泄漏时，宇航员需要立刻做出反应。
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