引进技术和引进专家相结合,加快引进技术实用化--向日葵杂交种F51引进与推广的启示引進技術和引進專傢相結閤,加快引進技術實用化--嚮日葵雜交種F51引進與推廣的啟示 인진기술화인진전가상결합,가쾌인진기술실용화--향일규잡교충F51인진여추엄적계시 Combination of Technique and Expert Introduction, Quickening Practicality of Technique Introduction --Inspiration from Introduction and Popularization of a Sunflower Hybrid 'F51'