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sandbox (n.)
[sandbox 词源字典]
also
sand-box
, 1570s as an instrument to sprinkle sand, from
sand
(n.) +
box
(n.1). From 1680s as "a box holding sand;" 1891 as a low-sided sand pit for children's play.
[sandbox etymology, sandbox origin, 英语词源]
[sandbox 词源字典]