The approach is more practical and less abstract than other Calculus books, while conserving a perfect balance between mathematical rigor and intuition.
这本书比其他微积分书要更实用而且更易懂，同时在数学的直观和严格方面保持了绝妙的平衡。
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。
Abstract: : the limit is Paramount basic concept in calculus, but also is one of the foundations to establish and apply all kinds of calculation methods and related concept in calculus.
摘要：极限是微积分中至为重要的基础概念，也是建立及应用微积分学中各种计算方法、相关概念的基础之一。
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