Abstract Port, due to its unique geographical location and relatively complete hardware facilities, has the inherent advantages.
港口由于其独特的地理位置以及比较完备的硬件设施,形成了先天优势。
Essence as an integrated part of substance possesses the characteristics of being general, abstract, relatively stable and multi-layer in structure.
本质作为事物内在的规定性,具有一般性、抽象性、相对的稳定性及结构上的多层次性。
APOS theory relatively prevails abroad at present and it has already been widely used in many aspects, such as function concept, abstract algebra, dispersed mathematics, calculus.
目前APOS理论在国外比较盛行,已经在函数概念、抽象代数、离散数学、微积分等多方面领域得到广泛应用。
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