许多爵士三重奏由钢琴、吉他和低音提琴组成。

Many jazz ___trios consist of a piano, guitar and double bass.

我们的三位200米跑手都未能进入决赛，令人失望。

There was disappointment for our ___trio of 200 metre runners, all of whom failed to reach the final.

晚会的其余时间，其他一些音乐学生展示了他们的潜力，最后以一首由三位女歌手组成的无伴奏三重唱结束。

The rest of the evening saw a few other music students showing off their potential and it ended with an unplugged title sung by a ___trio composed of female singers.