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...
...the evident desire of both superpowers to disengage from Afghanistan...两个超级大国都想从阿富汗地区撤军的明显意愿He signed his name with evident satisfaction.他显然很满意地签了名。Etanercept should be discontinued if a blood dyscrasia is evident.血液恶...
The contra - indications listed for the pills meant that she could not take them.这种药丸所列的禁忌症表明,她不能服用.Until closing, this account is classified as a contra account to Retained Earnings.在结帐之前, 这一帐户一直作为“保留盈利”的备抵帐户.That we ju...