snapshot (n.)youdaoicibaDictYouDict[snapshot 词源字典]
also snap-shot, 1808, "a quick shot with a gun, without aim, at a fast-moving target," from snap + shot (n.). Photographic sense is attested from 1890. Figuratively, of something captured at a moment in time, from 1897.[snapshot etymology, snapshot origin, 英语词源]