It was the first time a black singer performed regularly with an American opera group.

VOA: special.2009.01.25

I think she was also an opera singer.

我觉得她可能还是一个歌剧歌手。

麻省理工公开课 - 电影哲学课程节选

Yes, she was an opera singer as well.

对，她也是一个歌剧歌手。

麻省理工公开课 - 电影哲学课程节选