It turns out that the weak interaction causes a kaon gradually to convert into its antiparticle, the antikaon, and then back again.

弱交互作用会使k介子逐渐变成反粒子──反k介子，然后又变回来。

In the framework of quarkonia-quarkonia mixing, considering the effect of the flavor-dependent transitions between quarkonia, the new mass relation of a meson nonet is presented.

摘要在介子-介子混合的框架下，考虑到夸克偶素间的湮灭跟有关这应，给出新的介子九重态成员间的质量关系。

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，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有关这修正。