这位作曲家创作了一部四联歌剧，讲述了一个跨越百年的爱情故事。

The composer wrote a ___tetralogy of operas depicting a century-spanning love story.

医生确认婴儿患有法洛四联症，需要尽快安排手术。

The doctor confirmed the baby has ___tetralogy of Fallot and needs surgery soon.