耳コピ
(biochemistry) free fatty acid
a pseudonym, an alias, sobriquet, pen name / in feudal Japan, a public name given to boys upon coming of age, after which their birth names would be kept private
(informal) replication of a piece of music by ear
great-grandfather
He is good at playing the song by ear.
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DiQt（ディクト）
無料
★★★★★★★★★★
