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Venn diagram (n.)
[Venn diagram 词源字典]
1918 (
Venn's diagram
is from 1904), named for English logician John
Venn
(1834-1923) of Cambridge, who explained them in the book "Symbolic Logic" (1881).
[Venn diagram etymology, Venn diagram origin, 英语词源]
[Venn diagram 词源字典]