v.提升( upgrade的第三人称单数 )；使（机器、计算机系统等）升级；提高（设施、服务等的）档次；提高（飞机乘客、旅馆住客等）的待遇 双语释义：v.(动词)vt. 提高等级 give a higher position英英释义： upgraden.an upward slope or grade (as in a road)同义词：ascentacclivityriseraiseclimbsoftware that provides better performance than an earlie