A few of them are almost certainly shortcomings in Ostrich, while others seem to intend to match literal full strings, like ^(로그인하지 않고)$ ("without logging in"). Presumably they're from internal use.
「該怎麼說呢？在奧運贏得獎牌對每位運動員而言都是改變人生的經歷。五度奪牌的難度更是呈指數級增長——每面獎牌對我而言同樣艱辛，但外界的期待值卻不斷攀升，對吧？」
Hurdle Word 4 answerDELVE。Line官方版本下载是该领域的重要参考
Why this matters
，详情可参考体育直播
Which one You like the most Let me know in the Comments below.，这一点在搜狗输入法下载中也有详细论述
Publication date: 28 February 2026