1. The altos in the choir had a beautiful harmony during the performance.
在表演中，合唱团的女中音有着美妙的和谐。

2. The altos were given a challenging melody to sing in the upcoming concert.
女中音在即将举行的音乐会中被要求演唱具有挑战性的旋律。

3. The altos practiced their parts diligently in preparation for the competition.
女中音们为比赛做准备，勤奋地练习他们的音部。

4. The altos' voices added depth and richness to the overall sound of the choir.
女中音的声音为合唱团整体声音增添了深度和丰富度。

5. The altos stood in the back row of the choir, providing a strong foundation for the higher voices.
女中音站在合唱团的后排，为高音提供了强有力的支撑。

6. The altos were praised for their emotive performance that moved the audience to tears.
女中音因表演感人而令观众感动而受到赞扬。