首頁›Browse›F›flat signflat sign編輯正在努力提供更完整的內容，建議 20 分鐘後再回來看看flat signflat sign — 名詞名詞1. a musical symbol that lowers a note by a half step1.名詞釋義降記號a musical symbol that lowers a note by a half step例句The note B is played as B-flat when there is a flat sign in the key signature.