expositoryadj.
英 ɪks'pɒzɪtrɪ | 美 ɪk'spɑzətɔri
中文adj. 说明的；解释的；评注的（等于expositive）
词根词源
expository (adj.)1620s, from Medieval Latin expositorius, from exposit-, past participle stem of Latin exponere "set forth" (see expound). Earlier in English as a noun meaning "an expository treatise, commentary" (early 15c.). Related: Expositorial.
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