丰富的实践是我们进行理性思考的前提和基础。在分析一个客体之前．我们有必要先将这一客体的全貌特征呈现在世人面前。一者使人们有一种具体可感的形象；二来也可以便剖析有一个相对稳定的讨论范围：三者节省笔墨，也可免去许多不必要的背景介绍，便于行文。因此．首先我们有 Rich practice is the premise and basis for our rational thinking. Before analyzing an object. We need to present the whole picture of this object before the world. One enables people to have a concrete and sensible image. Second, there is a relatively stable scope for discussion: the three can save ink and brush and eliminate many unnecessary background introductions to facilitate writing. therefore. First we have