maintain/meɪnˈteɪn/
vt.1. 保持；维持He failed again and again simply because he had maintained his defeatist attitude.因为他一直坚持失败主义的态度，所以失败了一次又一次。
2. 赡养；供给He has worked hard to maintain his family.他努力工作来养家。
3. 继续存在4. 保养；维修The car has always been properly maintained.这汽车一直保养得很好。
5. 主张；为…辩护The socioligist maintained that a demotic society would lower the nation's standards.这个社会学家认为平民社会会降低国家的素质。