We watched a performance which included a puppet show and acrobatics.我们观看了一场演出,内容有木偶和杂技.The whole village was burnt down by the puppet troops.整个村子都被伪军焚毁了.He jerked the string and the puppet jumped.他猛一拉绳子,木偶就跳了起来....
较轻的推进器采用液态氢, 较重的采用自燃推进剂.The lighter version used liquid hydrogen, the heavier used hypergolic propellants.磷化氢是一种有毒气体,在空气中可以自燃.Phosphine is a toxic gas which ignites spontaneously in air.它们也可作为自燃点火成分,改进点火和重新点火性能.They also...