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...
Since 1979 China has collected 24.7 billion yuan in pollutant discharge fees.1979年以来,全国共征收排污费247亿元.The fees offered by the NHS do not recompense dental surgeons for their professional time...国民医疗保健系统所支付的费用中不涵盖牙科诊疗费用。High...
Newborn calves are not afraid of tigers. -- Young people are fearless.初生之 犊 不畏虎.The soldiers followed their fearless leader into the battle.士兵们随着他们勇敢的指挥官投入战斗.The boy seems completely fearless.这个男孩似乎毫不畏惧....