n.四音音階；完全四度；四弦琴

Two artists in December when in new York Bulukelin conducted a concert, with tetrachord the performance wraps around the song of head person. 兩個(gè)藝術(shù)家12月的時(shí)候在紐約布魯克林舉辦了一場(chǎng)音樂(lè)會(huì)，用四弦琴表演披頭士的歌。

Finally, buffett bought the tetrachord of rare the name of a river in Shaanxi and Henan provinces of 17 transparent red. 最后，巴菲特買了17把透明紅色的希洛四弦琴。

What she sang was a little bit difference with what Hai Xi Xi sang yesterday, the undulate of melody was little, end sound was close to tetrachord and hexachord. 她今天唱的和海喜喜昨天唱的又有所不同。旋律起伏較小，尾部結(jié)束音向上作純四度和大六度滑近。

' " memory says Weierhaimu, "I say is, next she asks, ' is world head then rich do not play tetrachord? ’”威爾海姆回憶說(shuō)，“我說(shuō)是，然后她問(wèn)，‘那世界首富就不彈四弦琴了嗎？’”