Playground
来自Big Physics
wiktionary
From play + ground. Compare Middle English playstede, playstude(“playground”) from Old English plæġstede(“playground”).
etymonline
playground (n.)
"piece of ground set aside for open-air recreation," especially as connected with a school, 1780; see play (v.) + ground (n.). Old English had plegstow, plaeg-stede, "village sports ground, gymnasium," literally "place for play."
