1) positive concept
肯定概念
2) concept definition
概念界定
1.
This paper introduces the concept definition and developing situation of nanometre, and puts forward the right attitude to welcome the nano-times.
介绍了纳米的概念界定及其发展现状 ,提出了迎接纳米时代应持的正确态
2.
Moreover, we considered several problems in concept definition and methodology concerning time perspective.
并对时间洞察力的概念界定和方法学方面存在的问题进 行了反思。
3) concept definition
概念定义
1.
Concept definitions serve as the foundation of mathematics, but they do not derive directly from the objective reality and have the multiple characteristics of abstractness, generalization and simplicity, thus, it is difficult for students to recite concept definitions without omitting a single word.
概念定义是数学的基础，但概念定义不是直接来自于客观现实中，且具有抽象性、概括性、简明性等多重性，因此，学生往往难以一字不漏地背诵概念定义。
5) quantitative concept
定量概念
6) qualitative concept
定性概念
1.
And the difficulty is uncertainty hidden in qualitative concepts, that is the randomness and fuzziness.
文章提出用云模型 3个数字特征 (期望值 ,熵 ,超熵 )来描述一个定性概念 ,用熵来关联模糊性和随机性。
补充资料：产权界定
产权界定——
产权界定是指国家依法划分财产所有权和经营权等产权归属，明确各类产权形式权利的财产范围和管理权限的一种法律行为。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条