英语语法分析

She became a professional mezzo-soprano.

她成为一名专业的女中音歌手。

《柯林斯英汉双解大词典》

Then there is also another fact: most of the music, we are going to play, let's say, mezzo-forte. 

然后还有另一个事实：我们将要播放的大多数音乐，例如，中音复音。

She became a professional mezzo - soprano.

她成了一名专业的女中音歌手。