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 If a goose gets sick or wounded,two geese drop out of formation and follow it down to help and protect. 1日日 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） If a goose gets sick or wounded, two geese drop out of formation and follow it down to help and protect. Teamwork