Such as at the beginning periods of several-department music, people always adopt to the the most simple frequency or the purest perfcet fourth and fifth interval.

如在多声部音乐萌芽时期除了应用八度音程以外，人们只采用频率比数最简单的，即音响最协和的纯五度与纯四度音程；

youdao

The next pitch on the trumpet is actually an interval of a fifth.

小号的下一个音高实际上是一个五度音程。

youdao

Then the next pitch on the trumpet is actually an interval of a fifth.

然后下一个音高在小号那里，实际上是一个五度音程。

youdao

Then the next pitch on the trumpet is actually an interval of a fifth.

然后下一个音高在小号那里,实际上是一个五度音程

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