ex·plan·a·to·ry /ɪkˈsplænəˌtori, ˌtɔr-/
(a.)解釋的,說明的,辯明的
explanatory
自解釋
explanatory
說明性
Ex·plan·a·to·ry a. Serving to explain; containing explanation; as explanatory notes.
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explanatory
adj : serving or intended to explain or make clear; "explanatory
notes"; "an explanatory paragraph"