main operation短语⁶³⁹⁷⁶ 基本例句 主操作 To assess the clinical value of duodenoscopy in diagnosing duodenal diverticulosis and the main operation points of the method. 目的：探讨十二指肠镜诊断十二指肠憩室病的方法要点和临床意义，指导临床治疗。 cnki Firstly, the main operation principle, research status and development trends are introduced. 首先介绍了非接触感应电能传输的原理、研究现状和发展趋势。 cnki