It indicates that a correct mass relation of a meson nonet (especially for the non ideal-mixing meson nonet) should incorporate the effect of the flavor-dependent quarkonia annihilation.

• 这表明，一个正确反映介子九重态（特别是非理想混合的介子九重态）成员间质量关系的公式，应该包含夸克偶素间的湮灭跟味道有关这种修正。