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...
If improved education is combined with other factors dramatic results can be achieved...如果把改良的教育体系和其他的因素结合起来，会取得非常惊人的效果。This quiet demographic counter - revolution is a dramatic upsurge in intermarriage.这种人口统计学意义上的逆向流动便是...
他就这运气，误了最后一班船也毫不出奇。It would be just his luck to miss the last boat.主人公丹尼与柯克·道格拉斯出奇地相像。The hero, Danny, bears an uncanny resemblance to Kirk Douglas.观众们出奇地安静，只是在每首歌结束后报以礼貌性的掌声。The audience are strangely subdued, clapping ...
We are aware of the potential problems and have taken every precaution.我们已意识到潜在的问题，并采取了全面的预防措施。I took the precaution of clearing out my desk before I left.我临走时特地事先把办公桌清理了一下。I took the precaution of locking money in the s...