Outdoor

来自Big Physics
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wiktionary

ref

From out- +‎ door.


etymonline

ref

outdoor (adj.)

"that is done or used in the open air, not in the house," 1748, from out- + door. Out-of-door is from c. 1800.

取自“https://www.bigphysics.org/index.php?title=Outdoor&oldid=22592”