expound
/ɪkˈspaʊnd/verb
with obj.
1- present and explain (a theory or idea) systematically and in detail详述, 阐述; 说明, 讲解（理论, 观点）：
he was expounding a powerful argument
他在阐述一个有力的论点。
no obj. he declined to expound on his decision.他拒绝就他的决定做出说明。
1.1
- explain the meaning of (a literary or doctrinal work)解释（文学作品, 教义作品）的意思：
the abbess expounded the scriptures to her nuns.
女修道院院长向修女们讲解了经文。
派生词
expounder
noun词源
Middle English expoune （in the sense 'explain (what is difficult)'）： from Old French espon-, present tense stem of espondre, from Latin exponere 'expose, publish, explain', from ex- 'out'+ponere 'put'. The origin of the final -d (recorded from the Middle English period) is uncertain （compare with COMPOUND1 , PROPOUND）.