摘 要： 目前 ，个体水平锻炼行为改变理论和干预已成为锻炼行为促进研究的主流。
Absrtact: At present , researches and interventions have focused on individual theoretical perspectives in the physical activity promo2 tion arena.
农业技术扩散的理论主要有框架理论、沟通理论、农户行为改变理论和技术创新扩散理论。
The paper analyzes the frame structure theory, the communication theory, the behavior alternation theory in products, and theory of the agricultural innovation and technology diffusion.
坏男孩身上的“黑暗性格”很明显，而且根据某一类理论，他们的行为是带有遗传性的，意味着他们不可能改变自己的处事方式。
Bad boys exhibit dark triad traits and their behaviour, according to one theory, is genetic, meaning they are unlikely to change their ways.
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