Doorstep

来自Big Physics
Safin（讨论 | 贡献）2022年4月27日 (三) 12:36的版本 （建立内容为“Category:etymology == wiktionary == [https://en.wiktionary.org/wiki/doorstep ref] From door +‎ step. == etymonline == [https://www.etymonline.com/word…”的新页面）
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wiktionary

ref

From door +‎ step.


etymonline

ref

doorstep (n.)

also door-step, "threshold, step up from the ground to a door," 1810, from door + step (n.).

取自“https://www.bigphysics.org/index.php?title=Doorstep&oldid=27635”