Background
来自Big Physics
Safin（讨论 | 贡献）2022年4月27日 (三) 00:38的版本 （建立内容为“Category:etymology == wiktionary == [https://en.wiktionary.org/wiki/background ref] back + ground == etymonline == [https://www.etymonline.com/word/ba…”的新页面）
wiktionary
back + ground
etymonline
background (n.)
"the ground or situation to the rear of what is in front or most engaging of the attention," 1670s, from back (adj.) + ground (n.); original sense was theatrical, later applied to painting ("part of a picture representing what is furthest from the spectator"), 1752. Figurative sense is first attested 1854.
