引入模糊球、模糊压缩球、模糊邻域等概念，用来作为对模糊自然语言词组“一点附近”、“某值附近”等的描述，分别从相关数学性质分析证明和示例仿真两个方面说明这种模糊描述的有效性。
The concepts of fuzzy ball, fuzzy press-ball and fuzzy neighborhood were proposed in this paper, which were employed to describe the fuzzy nature language words nearby a point or about a number .
由无限接近的思想产生出来的数学概念，主要用于研究函数在接近它们没有定义的点的过程中的行为。
Mathematical concept based on the idea of closeness, used mainly in studying the behaviour of functions close to values at which they are undefined.
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