小题1:Socializing keeps you slim/Keeping a busy social life makes people slim
小题2:aid weight loss/help lose weight
小题3:To show having a busy social life is an even more effective way of changing white fat into brown; They want to show the advantage of a busy social life To show the part socializing plays in changing white fat into brown
小题4:by changing white fat into brown which burns calories to generate heat; Socializing changes white fat into brown which burns calories to generate heat
小题5:在研究期间，和那些总是呆着不动的小鼠相比，有更多伙伴、更大空间和更多玩具的实验鼠减肥效果更明显。