General physical training and endurance training is mainly concentrated in the preparation period and League break; speed and strength training almost throughout all periods; technical and tactical training mainly in the period of competition. 2. 一般体能训练和耐力训练主要集中在准备期和联赛间歇期;速度和力量的训练几乎贯穿了所有时期;技战术训练则主要是在比赛期进行的。
This paper has summarized general situation of lecithin in chemical structure, physical chemistry property, physiological activities, separation and preparation, quality control and application. It has also demonstrated the wide prospect of research of lecithin in food and medicine. 综述了卵磷脂的化学结构、理化性质、生理活性、制备和分离提取、质量控制和应用等方面的研究概况,展示了其在食品、药品等研究开发方面的广阔前景。