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📅  最后修改于: 2022-03-11 14:52:00.852000             🧑  作者: Mango
library(dplyr) bind_rows(a, b) > bind_rows(a, b) a b c d 1 1 3 5 NA 2 2 4 6 NA 3 7 2 3 8 4 8 3 4 9