【摘要】 数列极限的ε－Ｎ定义是极限概念的基础，通常比较难理解。笔者通过从直观描述到精确的定义，逐步深入来讲述ε－Ｎ，ε－δ，就其语言教学的难点，提出解决问题的方法更多还原

【Abstract】 The "ε-N" "ε-δ" definition of an ordered series of numbers limit is the basis of the concept of the limit is difficult to understand. The writer finds the solution to the problem for teaching,from object description to accurate definition step by step.更多还原