失效

• 拼音: shī xiào
• 汉字拆解: 失 = 手 + 乙 (to lose, to let slip); 效 = 交 + 攴 (effect, efficacy, to produce results)

含义

To become invalid; to cease to function or produce the intended effect — said of documents, mechanisms, contracts, or measures that no longer have legal or practical force.

Used across legal, technical, and medical domains. Common collocations: 合同失效 (contract becomes invalid), 政策失效 (policy loses effect), 疫苗失效 (vaccine becomes ineffective), 证件失效 (document expires or becomes invalid), 防火墙失效 (firewall fails). Implies a transition from a state of validity to one of invalidity or ineffectiveness.

例句

1. 该护照已于上月到期，持有人在出行前须尽快办理换发手续，否则将因证件失效无法正常通关入境。
2. 实验室检测显示，这批药品的有效成分因保存不当而加速分解，实际效力已远低于标准，可视为临床失效。
3. 旧有的市场监管框架面对新型数字经济模式时不断暴露出失效的迹象，亟需出台针对性更强的监管法规加以完善。

用法指南

语境: law, medicine, technology, governance, contracts

语气: neutral

正确说法

• 网络安全专家提醒，旧版本的加密协议已在多次实际攻击中被证明失效，企业须尽快完成系统升级以规避数据泄露风险。(Cybersecurity experts have warned that older versions of encryption protocols have been proven ineffective in multiple real-world attacks, and enterprises must complete system upgrades as soon as possible to mitigate the risk of data breaches.)
• 政策制定者在评估现行环保法规时，发现部分条款面对新型污染物已告失效，亟需通过立法修订及时予以更新。(When evaluating current environmental regulations, policy makers found that certain provisions had already become ineffective against novel pollutants and urgently needed to be updated through legislative amendment.)

错误说法

• 失效 to describe a person losing their effectiveness or becoming incompetent — 失效 applies to mechanisms, systems, documents, or measures, not to human ability; use 失去效率 or 能力下降 for a person's decline in effectiveness

起源与历史

失 (to lose) + 效 (effect, efficacy, validity)

文化背景

世代: All ages

社会背景: Universal