rationale

US /ˌræʃ.əˈnæl/
UK /ˌræʃ.əˈnæl/
1.

理論的根拠

a set of reasons or a logical basis for a course of action or a particular belief.

:
•
he explained the rationale behind the change
:
reasoningthinkinglogicgroundssenseprincipletheoryphilosophyhypothesisthesisargumentcasemotivemotivationexplanationjustificationexcusevindication