wài yán
意思解释：（Denotative）概念所确指的对象的范围，如“圆”这个概念的外延是指大大小小一切的圆。
指具有概念所反映的本质属性的对象。与内涵相对。外延是概念的量的方面，它说明概念反映的是哪些事物，亦即概念的适用范围。如“桌子”这个概念，它的外延包括形状、颜色、用料、用途等不同的一切桌子。真实概念都有与之对…
Point to the object of the substaintial property that has notional institute report. As opposite as connotation. Extension is the respect of notional quantity, what it explains the concept is mirrorred is what thing, the suitable scope of i.e. concept. Be like table this concept, its extension includes appearance, color, wait for all different tables with makings, utility. True concept has be opposite to it...
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