key signature
柯林斯词典
1. N a group of sharps or flats appearing at the beginning of each stave line to indicate the key in which a piece, section, etc, is to be performed 音调符号[music]
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1. N a group of sharps or flats appearing at the beginning of each stave line to indicate the key in which a piece, section, etc, is to be performed 音调符号[music]