adj.解释的，阐释的,
Merriam-Webster Online Dictionary
expository (adjective)of, relating to, or containing - exposition expository writing
Merriam-Webster Online Thesaurus
expository (adjective)serving to explain
SYNONYMS:
elucidative, exegetical ( exegetic), explanative, explicative, explicatory, expositive, expository, illuminative, illustrative, interpretative, interpretiveRELATED WORDS:
analytic ( analytical), demonstrative, discursive; exculpatory, exonerative