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trio
[trio 词源字典]
trio:
see
three
[trio etymology, trio origin, 英语词源]
trio (n.)
1724, "composition for three voices," from French
trio
(c. 1600), from Italian
trio
, from
tri-
"three" (see
three
); patterned on
duo
. Meaning "group of three persons" is from 1789.