We first demonstrate the approach through a simple example, and then propose a structure of system artifacts based on formal levels of abstraction.
首先,我们会通过一个简单的示例演示此方法,然后提出一个基于正式抽象层次的系统产品的结构。
All languages have two general levels of usage—a formal level and an informal level.
所有语言都有两种基本的用法——正式用法和通俗用法。
Finally, we found that the presence of a friendly, but not knowledgeable, mediator can enable children to reach levels of learning similar to formal schools with trained teachers.
最后,我们发现,一种友好但不博学的媒介,可以使孩子们达到类似于在有训练有素教师的正规学校的学习水平。
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