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...