The lighter version used liquid hydrogen, the heavier used hypergolic propellants.较轻的推进器采用液态氢, 较重的采用自燃推进剂.Pressure - fed engines are particularly susceptible to dissolved gas in the propellants.挤压 式 发动机对推进剂中溶解的气体特别敏感.Thi...
Deliberate before you begin, then execute with vigour.著手前要深思熟虑，执行要果断有力。He was a man of extraordinary vigour and liberality of mind.他是个生气勃勃和思想非常开朗的人.A succinct style lends vigour to writing.措辞简练使文笔有力.His body lacks the bo...
Hence, the damage radii can not be determined from overpressure alone.因此, 破坏半径不能单单由超压力大小来决定.The radii of the rings are determined by the spacing of the gravity observation points.圆的半径为重大观测点之间的距离所决定.Use to estimate turnin...
学生能利用自然发音法的规则熟悉英语单字.Students can be more familiar with the English vocabulary by the instruction of phonics.为什麽那麽多语言学家、心理学家强烈反对放弃自然发音法?WHY DID SO MANY LINGUISTS and psychologists object strongly to the abandonment of pho...