“曲子”造句

演奏钢琴的戴夫将这支曲子反复弹了两三遍。
Dave, the pianist, played it over a couple of times.

这首曲子有，嗯，大约半个小时那么长，对吗？
This piece is, what, about a half an hour long?

他写了一组非常单调枯燥的曲子。
He has written a batch of very samey tunes.