词典释义：
释义
v.
raise (something) to a higher standard, in particular improve (equipment or machinery) by adding or replacing components
使升级，提升，改进
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[as adj.
upgraded ]upgraded computers .升级的电脑。
raise (an employee) to a higher grade or rank
使（雇员）升职。
n.
an act of upgrading something
升级，提升。
an improved or more modern version of something, especially a piece of computing equipment
（尤指计算设备的）升级版；升级品。
短语
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on the upgrade improving； progressing 提升中，改进中
