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...
他划掉了“编剧”二字，改为“作者”。He crossed out "Screenplay" and put "Written by" instead.麦克说出最后这两个字时，吓得声音颤抖。Mack made his voice quiver with fear on these last two words.我不得不承认自己的字写得不好看。I have to admit that I have bad handwriting....
She bustled about, turning on lights, moving pillows around on the sofa.她打开灯，摆好沙发上的枕头，四处忙活。The hostress bustled about with an assumption of authority.女主人摆出一副权威的样子忙来忙去.My mother bustled around the kitchen...我母亲在厨房忙得团团转。Sh...