If there is not a finished tune, there are phrases, and there is assuredly a motif, articulated, reiterated.

如果没有完整的曲调， 则有乐句，而且肯定有一个主题， 经过表达和重申。

So we looked at musicologists, and they have debated what is a motif, a short melody versus a longer melody.

所以我们研究了音乐学家，他们争论什么是主题，短旋律还是长旋律。