这些机器将来会需要备件和维修保养。In the future the machines will need spare parts and maintenance.我不得不支付房屋维修费用。I have had to pay for repairs to the house.数据记录仪还能迅速查明机械故障，减少维修次数。Data recorders also pin-point mechanical faults rapidly, re...
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...