劍橋詞典the standard form of blues song , consisting of three parts that are each four bars long 十二小節(jié)藍(lán)調(diào)(標(biāo)準(zhǔn)的藍(lán)調(diào)歌曲,由三部分組成,每部分四小節(jié)長) 返回 twelve-bar blues