一成不变

• ピンイン: yī chéng bù biàn
• 漢字の分解: 一 = one/a; 成 = to become, to be established/fixed; 不 = not; 变 = 亦 + 攴 (change, to alter — movement bringing alteration)

意味

一成不変（固定化して変わらない／融通が利かない）

A four-character idiom (成语). 一成 originally referred to 'one fixed proportion' in classical usage; 不变 means 'does not change.' Used to criticise rigidity in thinking, method, or routine. Implies that flexibility or innovation is lacking. Can describe people, systems, methods, or habits.

例文

1. 科技行业瞬息万变，任何一成不变的商业模式都难以维持长期竞争力，企业必须持续创新。
2. 优秀的教师会根据不同学生的特点因材施教，而不会以一成不变的方式对待每一个孩子。
3. 二十年来这家老字号餐厅的菜单几乎一成不变，凭借对传统口味的坚守赢得了忠实顾客群。

使い方ガイド

場面: business, education, criticism, social commentary

トーン: critical

正しい言い方

• 全球化时代，一成不变地守着传统值得尊重，但若拒绝与外来优秀文化交流借鉴，就会走向封闭。(In the age of globalization, sticking to tradition without change is worthy of respect, but if you refuse to exchange and learn from excellent foreign cultures, you will become closed off.)
• 这位主管的管理风格二十年来一成不变，既不采纳下属反馈，也不随行业变化调整团队架构，最终导致部门人才流失严重，整体效能持续下滑。(This supervisor's management style had remained entirely unchanged for twenty years; neither incorporating feedback nor adjusting the team structure as the industry evolved, ultimately causing serious talent attrition and a sustained decline in overall effectiveness.)

避ける言い方

• 时间一成不变地流逝 — 一成不变 describes entities capable of adapting (people, systems, methods); time passing is inherently constant, so the phrase produces an odd tautology; use 时光流逝 or 岁月如流 instead

起源と歴史

一 (one/a fixed) + 成 (established/settled — to accomplish, to become fixed) + 不 (not) + 变 (change — 亦 + 攴; to alter)

文化的背景

時代: Classical/Modern

世代: All ages

社会的背景: Universal