上游充通大学 材料科学与工程学院 School of Materials Science and Engineering.SITU 1896 1920 1987 2006 Teamwork If a goose falls out of the V-formation,it quickly gets back to take advantage of the lifting power 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 falls out of the V- formation, it quickly gets back to take advantage of the lifting power Teamwork