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...
The light of a lamp glimmered throught the cracks of the door.一盏油灯透过门缝闪烁着.They mudded the cracks courtyard wall.他们用泥把院墙的裂缝堵上.Fine , random cracks or fissures in a paint film, caused by shrinkage.因为收缩而导致的涂层细小的, 无规律的破裂.The...
从撒克逊时代起就开始采伐塞文山谷的这些树林获取木料。These Severn Valley woods have been exploited for timber since Saxon times.英国最长的河流是塞文河.The longest river in the United Kingdom is the River Severn.他们向塞文河上游驶去,从布里斯托尔港到格洛斯特.They went up the Severn...