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upgrade (n.)
[upgrade 词源字典]
also
up-grade
, 1847, "upward slope," from
up
(adj.) +
grade
(n.). The meaning "upgraded version" is recorded from 1980.
[upgrade etymology, upgrade origin, 英语词源]
upgrade (v.)
"increase to a higher grade or rank," 1904 (transitive); 1950 (intransitive), from
up
(adv.) +
grade
(v.). Related:
Upgraded
;
upgrading
.