Explanation and demonstration are the main teaching methods in football teaching.
在足球教学中讲解、示范是其主要教学手段。
Organization: Running into a linear one, the teacher explanation and demonstration.
组织：将一个线性的，老师的讲解与示范运行。
Flash source of Flash drawing API for some explanation and demonstration by example.
Flash源码，对Flash中绘图api进行了一定解释，并用例子演示。
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