present and explain (a theory or idea) systematically and in detail
详述,阐述;说明,讲解(理论,观点)
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he was expounding a powerful argument 他在阐述一个有力的论点。
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[no obj.]
he declined to expound on his decision .他拒绝就他的决定做出说明。
explain the meaning of (a literary or doctrinal work)
解释(文学作品,教义作品)的意思
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the abbess expounded the scriptures to her nuns .女修道院院长向修女们讲解了经文。
"Middle English expoune (in the sense ‘explain (what is difficult)’): from Old French