n.

a concept or idea not associated with any specific instance

"he loved her only in the abstract--not in person"

同義詞：abstraction

a sketchy summary of the main points of an argument or theory

同義詞：outlinesynopsisprecis

1. The conference proceedings included abstracts of all the presented papers.
   會議記錄中包含了所有提交論文的摘要。
2. The artist’s work often explores abstract concepts rather than concrete imagery.
   這位藝術(shù)家的作品常常探討抽象概念，而不是具體的圖像。