Sandbox
来自Big Physics
Safin（讨论 | 贡献）2022年4月28日 (四) 23:26的版本 （建立内容为“Category:etymology == wiktionary == [https://en.wiktionary.org/wiki/sandbox ref] sand + box. == etymonline == [https://www.etymonline.com/word/sandbo…”的新页面）
wiktionary
sand + box.
etymonline
sandbox (n.)
also sand-box, 1570s as a perforated device to sprinkle sand, from sand (n.) + box (n.1). From 1680s as "a box holding sand." In U.S. locomotives, "a device to put sand on the rails when wet wheels slip" (by 1849). By 1891 as a low-sided sand-pit for children's play.
