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。
E. before installation, for field service personnel to the owner and the demand side technology gives the low-down, explanation and demonstration to be carried out by programs and methods.
安装调试前，供方现场服务人员向业主方及需方技术交底，讲解和示范将要进行的程序和方法。
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