短语词组用作名词 (n.)动词+～claim maintenance 要求得到抚养费learn maintenance 学习保养形容词+～preventive maintenance 预防性保养routine maintenance 日常保养名词+～building maintenance 房屋维修car maintenance 汽车保养file maintenance 文件保管～+介词the maintenance of law and order 维持法律与秩序短语 返回 maintainance