声区及其统一的理论是“头声”技术的理论渊源和方法依据。

The "head voice" technique is deeply rooted in the theories about vocal register and its unity.

youdao

声区及其统一的理论是“头声”技术的理论渊源和方法依据。

The "head voice" technique is deeply rooted in the theories about vocal register and its unity.

youdao