It later emerged that the spacecraft 's heat shield had been damaged on launch , letting superheated air inside and tearing it apart .
随后调查发现航天飞机的防热罩在发射时就已破坏,使得过热空气渗入,机体分裂。
The control rods , in turn , react to the superheated steam and begin to release hydrogen and radioactive gases . These are also released through the porv .
控制棒接连与过热蒸汽产生反应,释放出氢气以及放射性气体,这些气体也通过减压阀释放。
Burning thousands of litres of rocket fuel every second and blasting superheated gas into the water-filled trench beneath the pad , the engines will kick up the vast gouts of steam and smoke that characterise a rocket launch .