Sightsinging teaching, as the basic theory of music, its importance has been embodied increasingly.
作为音乐基础理论的视唱教学，越来越体现出它的重要性。
It is considered that the intervals used in piano tuning should accord with the ones in basic theory of music in the way of calculation and nomenclature.
有鉴于此，钢琴调律中所使用音程不仅应与乐理中相应音程保持级数计算方式的一致，而且取名原则也应一致。
Musical theory is the basic course of learning music.
乐理就是音乐理论，是学习音乐的基础课程。
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