n.浓缩v.提升( upgrade的现在分词 )，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...

Many people are upgrading their mobiles to top-end models.很多人不断将手机升级到最高档的款式。Practical application results are perfect after the well done upgrading.改造实施后达到理想的使用效果.The thesis explains investment decision of R & D upgradin...

upgrading的音标：upgrading的英式发音音标为：['ʌpgreɪdɪŋ]upgrading的美式发音音标为：['ʌpgreɪdɪŋ]...