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Did you mean: Lei, David Simchi-Levi, David Levine, David M. Da le da le wen hua Leslie, David, Simchi-Levi, David. Lee, David, Lee, Roo-Da. Lei jing da xue, Ba lei wu -- Wu dao dong zuo -- Tu jie. Da le wen hua you xian gong si, jiao yu bu gao xiao gong shang guan li lei jiao xue zhi dao wei yuan hui shuang yu jiao xue tui jian jiao cai