raise (something) to a higher standard, in particular improve (equipment or machinery) by adding or replacing components.
the cost of upgrading each workstation is around $300
同义词：
improvebettermake betteramelioratereformenhanceadd tocustomizetouch uprehabilitaterefurbishreconditionmodernizeupdatebring up to daterenovateredecoraterevamprestoreremodelredobrighten upspruce upbring up to codeinformal：do upfix up
名词
1
an act of upgrading something.
a room upgrade from a twin to a duplex suite
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upgrade的示例
a room upgrade from a twin to a duplex suite
check that the upgrade is installed and performing correctly
