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...
It is France versus Brazil in the final.决赛是法国队对巴西队。The most exciting game was Harvard versus Yale.最富紧张刺激的球赛是哈佛队对耶鲁队.Each report starts with a recap of how we did versus our projections.每份报告开头都扼要回顾了我们的表现和我们的预期目标。...
Environmentally-conscious Germans are worried about the pollution the car produces.关注环境的德国人对汽车造成的污染十分担心。Our brochure is printed on environmentally-friendly paper.我们的小册子是用环保纸张印刷的。He veered away from the most environmental...