- 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.