名詞 rationale:

1. (law) an explanation of the fundamental reasons (especially an explanation of the working of some device in terms of laws of nature)
   同義詞：principle

1. I do not understand the rationale behind the decision to sell the warehouse.
   我不明白在出售倉庫的決定后面有什么原由。

ra.tion.ale

n.（名詞）
Fundamental reasons; the basis.
根本原因；最基本的原因；基礎
An exposition of principles or reasons.
解釋：對原則和理由的表達

來源：
Late Latin ratiôn3le
后期拉丁語 ratiôn3le
from neuter of Latin ratiôn3lis [rational] * see rational
源自 拉丁語 ratiôn3lis的中性詞 [理性的] *參見 rational