After those six seconds, a shuttle? S twin solid rocket boosters ignite, explosive bolts holding the spacecraft down are severed and the entire stack soars spaceward.
6秒之后，航天飞机的双固体燃料火箭推进器点火，固定航天器的爆炸螺栓切断，整个航天飞机一飞冲天。
2
In a solid-fuel rocket the reaction of fuel mixture is relatively slow and steady rather than explosive.
在使用固体燃料的火箭中，燃料混合物的反应比较缓慢而稳定，而不是爆发性的。
3
Sawdust is one of solid combustible agent used in powder ammonium nitrate industrial explosive, which acts as sensitizer and looseness, but modification research on sawdust is little.