V2火箭并非普通武器：它只能用于对付城市。原子弹也是这样。The V2 was not an ordinary weapon: it could only be used against cities. Likewise the atom bomb.一颗原子弹能摧毁一座城市。An atom bomb would destroy a city.只有总统才能授权使用原子弹。Only the President could authorize...
Symptoms of anaemia include weakness, fatigue and iron deficiency.贫血的症状包括虚弱、疲劳和缺铁。They did blood tests on him for signs of vitamin deficiency.他们给他验了血，以检查是否有维生素缺乏的迹象。AIDS stands for Acquired Immune Deficiency Syndrome.AID...
在转换时期的RNA合成可能有短暂的骤增.During the climacteric may be a transient burst of RNA synthesis.他们想今后几年内使哈珀 - 格兰特公司的营业额骤增两倍.They want to treble Harper & Grant's business over the next few years.如果发动机回火, 进气歧管骤增的压力就迫使阀门向后移动.If t...