maintainern.维修工maintainvt.维持；维修；保养；坚持；断言maintainability index保养率指数maintain relationship保持关系maintain public order维持治安Maintainable decision维持决定maintain an open mind无成见maintain the style of保持 ... 的作风maintain independence保持独立maintain free battery免维护蓄电池maintain one's health维护健康maintaining freshness保鲜