上游充通大学 材料科学与工程学院 School of Materials Science and Engineering.SJTU 1896 1920 1987 2006 Teamwork Flying in a V-formation adds 71%more flying power than if each bird flew alone 1日三日 工程学导论-李军（材料B楼308）1896 1920 1987 2006 工程学导论-李军（材料B楼308） Flying in a V-formation adds 71% more flying power than if each bird flew alone Teamwork