librettist的复数形式为：librettists...

The musician and the librettist were collaborators.音乐家与剧作者通力合作....

n.歌词作者，剧本作者...

librettist的音标：librettist的英式发音音标为：[lɪ'bretɪst]librettist的美式发音音标为：[lɪ'brɛtɪst]...