main gap meaning in English

咒隙
主架
主间隙

On the base of putting forward the concept of security and intensive aquiculture , the thesis recounted the basic principles , property characters and requirements of security and intensive aquiculture ; then analysed the relationship and main gap between traditional aquiculture and security and intensive aquiculture on methodology ; finally discussed the endeavor aspect of security and intensive aquiculture in china
摘要在提出安全养殖概念的基础上，著重叙述了安全精养的基本原理、属性、特徵和要求，分析了传统精养与安全精养间在养殖观和方法论层面上的关联及主要差距，最后就我国水产安全精养的努力方向进行了探讨。