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.这个工厂为弹道导弹生产推进剂。The factory produces propellant for ballistic missiles.挤压 式 发动机对推进剂中溶解的气体特别敏感.Pressure - fed engine...
Economic crises recur periodically.经济危机周期性地发生.Great crises often call forth gifted leaders.危急存亡之际常能产生天才的领袖.People who are undernourished also lack reserves of energy when faced with physical or mental crises.营养不良的人在体力或脑力...
Take a hundred and twenty values and calculate the mean.取120个值计算平均数。Family values are suddenly the name of the game.家庭价值观突然变得重要起来。Bennett launched a crusade for "moral values" against decadent "liberal relativism."贝内特发起了...
Marines with rifles guarded them...手持步枪的海军陆战队士兵监视着他们。The prisoners were closely guarded.囚犯受到严密监视。The player was guarded closely by her opponent.那名运动员被她的对手紧紧地看住。When they exchanged ideas,their talk was too guarded.在他们交换意见...