Expression substance and content substance are the origin and target in communication as well as the starting point and ending point in the four levels of language coding theory.
“表达实体”和“内容实体”是语符理论四个层次中的基点和顶点，也是交际的起源点和目标点。
The response generally lacks substance beyond expression of very basic ideas.
这种回应除了表达非常基本的想法，一般都缺乏实质内容。
Finally, we point out: the essence of landmark building is the image in the image of city by the substance and space, and its expression is base on a good urban design.
最后，我们指出：标志性建筑的本质是以空间实体为依托的城市意象中的意象，它有赖于优良的城市设计来表达。
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