1
remain unchanged
常用系动词remain搭配，表示持续不变。
The rules remain unchanged.
规则保持不变。
无变化的；持稳的
先理解核心含义，再看它在真实句子里的用法。
无变化的；持稳的
not made or become different
The rules remain unchanged.
规则保持不变。
未改变或未变更；保持原状
Not changed or altered; remaining in an original state.
Despite studying hard, his test scores remained unchanged.
尽管努力学习，他的考试成绩仍然没有变化。
The company's policy on remote work has remained unchanged for years.
公司关于远程工作的政策多年来保持不变。
The traditional recipe has remained unchanged for generations.
这个传统食谱世代相传，一直保持不变。
常用系动词remain搭配，表示持续不变。
The rules remain unchanged.
规则保持不变。
leave sth unchanged表示使某物保持不变，宾语后接形容词作补语。
Please leave the settings unchanged.
请保持设置不变。
be unchanged from表示与某事物相比没有变化。
The price is unchanged from last year.
价格与去年相比不变。
Not this
The price unchanged.
Use this
The price is unchanged.
在英语中，形容词"unchanged"不能单独作谓语，必须与系动词（如is, remained）连用。汉语中形容词可直接作谓语，但英语需要系动词。
Not this
He unchanged his decision.
Use this
He kept his decision unchanged.
"unchanged"是形容词，不能作为及物动词使用。要表达"使某物保持不变"，需要使用"keep/leave + 宾语 + unchanged"结构。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
保持不变
The policy will remain unchanged for the next year.
该政策在未来一年内将保持不变。
使保持不变；维持原样
We decided to leave the original design unchanged.
我们决定保持原设计不变。
基本不变
The company's strategy remains essentially unchanged.
该公司的战略基本保持不变。
几乎不变
The landscape has remained virtually unchanged for centuries.
这片景观几个世纪以来几乎未变。
大致不变
The rules are largely unchanged from last year.
规则与去年大致相同。
Use unchanged naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想“un-”否定前缀 + “changed”变化，就是“没变化”，像一块不变的石头。记住：unchanged = 未改变。
通常用于正式或技术性语境，表示没有变化。
常与 remain, stay 等连用，也可作定语
Dictionary facts from ECDICT, WIKTIONARY.