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a : a musical note or tone a single 50 % action lessen than a specified note or tone b : a personality ♭ with a line or Place from the musical staff indicating a half step fall in pitch英式英語中也會使用 apartment 這個詞，但相較於美式的 apartment，英式的 apartment 指的大多是較為高級的住宅，公寓整體的設