A class diagram is a more abstract representation of the structure of a program.

而类图则是对一个程序结构的更抽象的表示。

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In SGML lingo, an entity is an abstract representation of a resource or a file in a document.

在SGML的方言中，实体是资源或者文档文件的抽象表示。

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It is an abstract representation of the crest of the northern border, for which Maister's soldiers fought.

它抽象地表示了士兵们曾在那战斗过的北部边境地区。

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In each of the examples above, we witness the compelling effect of data transformed from an abstract state to a physical representation on a map, instantly bringing it to life.

FORBES: Why Animated Data Maps Work So Well

Yet despite what seems to be an innate preference for more or less literal representation of the visible world, the abstract idea remains to this day both seductive and perennially relevant.

WSJ: The Seductive Lure of Abstraction | Sightings by Terry Teachout

Pollock's use of disguised and obscured representation, although later difficult to detect, persisted into his abstract masterpieces of the late '40s and early '50s.

WSJ: Men of Fire | Hood Museum | Becoming Jackson Pollock | By Lee Rosenbaum