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...
人们把这个组合称作 “ 间隔 ” 的平方.This combination is named the square of the " interval ".他越过把他们分开的年龄间隔的代沟, 和善地加以解释.He explained, good - naturedly, across the little gap of years that separated them.对谐振子来说,能级是等间隔的.For a harmonic osc...
他不想过一种空虚的生活.He didn't want to live an empty life.人类只是在 “ 空虚的永恒中孤独地流浪着 ”.Humanity is left " wandering forlorn among the empty eternities ".他在吸烟喝酒这种空虚的快乐中虚度年华.He wasted his time in the vain pleasures of smoking and dr...
The extrusion of silica - rich lava, the Rooiberg felsite, occurred on a grand scale.富于 硅氧 的岩流及罗依山霏细岩的喷出作用占据了广大面积.There are lots of advantages by cold extrusion for straight knurl nut in a single process.直纹滚花螺母采用冷挤压一次成形新...