safety engineering短语¹⁴⁴⁹⁷²⁺² 基本例句 保安技术,安全工程,保安工程学,安全技术 The reason why the establishment of safety engineering speciality should transit form vertical disciplines to cross-sectional disciplines was briefly introduced. 概述从按纵向学科建设安全技术专业到按横向学科建设安全工程专业的缘由。 cnki