Hadron (baryons and mesons) spectroscopy opens the gate for the development of the fundamental theory of the strong interaction: quantum chromodynamics (QCD).

子谱为量子色力学(QCD)理论的发展提供了一个很好的场所。

The so-called hadron, is one kind of subatom granule, all comes under the strong interaction influence the subatom granule to be called the hadron.

所谓子，就是一种亚原子粒子，所有受到相互作用影响的亚原子粒子都被称为子。