A model is a description of a system from a particular perspective, omitting irrelevant detail so that the characteristics of interest are seen more clearly.
模型是以特定的观点对系统的描述，忽略了不相关的细节，同时更清晰地看到关注的特性。
2
Consumers identify themselves and their characteristics by their electronic participation in particular interest groups, and by their general online behaviour.
消费者根据他们在某一利益群体中的的电子化参和总体的网络行为把自己以及他们的共同特征归类归属。
3
A maturity level is defined by a set of characteristics or capabilities which can be measured and assessed within a domain of interest.