词源 |
upgrade n.also up-grade, 1847, "upward slope," from up (adj.) + grade (n.). The meaning "upgraded version" is recorded from 1980. upgrade v. "increase to a higher grade or rank," 1904 (transitive); 1950 (intransitive), from up (adv.) + grade (v.). Related: Upgraded; upgrading. updated on April 21, 2014 |