the rationale for sth
常用结构，表示某事的理由。
The rationale for the new policy is to improve efficiency.
新政策的原理是提高效率。
理由；根据；根本原因
（尤指对装置运作原理的）根本原因阐释；基本原理；解释某事的基础或根本原因。；(法律)根本原因阐释,尤指依据自然规律对装置工作原理的解释；理由或合理化解释；基本原理；[医] 原理
The set of reasons or the logical basis for a decision, action, or belief.
解释某事的基础或根本原因。
An explanation of the basis or fundamental reasons for something.
(法律)根本原因阐释,尤指依据自然规律对装置工作原理的解释
(law) an explanation of the fundamental reasons (especially an explanation of the working of some device in terms of laws of nature)
理由或合理化解释
A justification or rationalization for something.
The rationale behind the new policy is to reduce traffic congestion.
这项新政策背后的基本原理是减少交通拥堵。
用法提示：名词rationale表示做某事的根本原因或逻辑依据。
AI contextual example
She explained the rationales for choosing each candidate.
她解释了选择每位候选人的理由。
用法提示：复数形式rationales指多个不同的理由或基本原理。
AI contextual example
What is the rationale for moving the meeting to next week?
把会议推迟到下周的理由是什么？
用法提示：名词rationale用于询问某个决定或做法的理由。
AI contextual example
常用结构，表示某事的理由。
The rationale for the new policy is to improve efficiency.
新政策的原理是提高效率。
强调隐藏在事物背后的原因。
I don't understand the rationale behind this decision.
我不理解这个决定背后的理由。
后接同位语从句，说明理由的具体内容。
The rationale that the project would save money proved false.
该项目能节省资金的理由被证明是错误的。
更通用，不限于法律或科学语境
强调合理性，而非纯粹解释
最接近，但较泛化
强调根基而非过程
常用复数，法律或正式语境
grammar · medium
易错句子This is a very rationale decision.
正确表达This is a very rational decision.
将名词 'rationale' 误用作形容词；正确的形容词是 'rational'，意思是‘理性的’。
grammar · medium
易错句子What is the rationale that he did that?
正确表达What is the rationale for his doing that?
'rationale' 后接原因，常用介词 'for' 引出；'that' 引导从句不自然，应改为 'for + 动名词' 结构。
rationale侧重解释原因本身（名词）；rational是形容词，指基于理性的行为或思想。
rationale指客观根本原因；rationalization常指事后辩解或粉饰，带主观性。
根本理由
The underlying rationale for the policy is to promote efficiency.
该政策的根本理由是为了提高效率。
……的理由
Can you explain the rationale for your decision?
你能解释你决定的理由吗？
……背后的理由
The rationale behind the new law is still unclear.
新法律背后的理由仍不清楚。
解释理由
The professor explained the rationale behind the experiment.
教授解释了实验背后的理由。
提供理由
The report failed to provide a rationale for the proposed changes.
该报告未能为提议的变更提供理由。
root
suffix
rationale 常基于某一原则或基本原理来解释原因。
rationale 提供行动或决策的正当理由，与 justification 密切相关。
rationale 本质上是一种解释，阐明事物的根本原因。
rationale 涉及逻辑推理过程，推导出结论的依据。
rationale 作为论据或理论的基础，支撑后续结论。
Dictionary facts from ECDICT, WIKTIONARY.