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试验一示范是农业技术推广程序中两个重要步骤．科学地按整体思路设计试验──示范，是提高推广效率的基本原则。本文提出了以技术内容，技术实体和工作形式三个方面的设计．
A pilot demonstration is two important steps in the agricultural extension program. Scientifically designing experiments according to the overall idea ─ ─ demonstration, is to promote the promotion of the basic principles of efficiency. This paper presents the design of the three aspects of technical content, technical entity and working form.