upgrade

/ˈʌp.ɡɹeɪd/ 名词 B2

中文：升级

An upward grade or slope.
An improved component or replacement item, usually applied to technology. · Near-synonym: option· With my phone company, I get a free upgrade every twelve months if I keep topping up 10 pounds a month.
An improvement. · The remarried couples among my friends often joke that their divorce and remarriage amounted to an upgrade.

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