1.不时[个别]发生的;分散的;零星的;特发的,散发的
1.not regular or frequent
2.a sporadic disease appears in separate areas of a country or region with no clear connection between the cases
1.Medicine has proved: Sporadical masturbation behavior won't have what effect to the body.
医学已经证明:偶尔发生的手淫行为对身体不会有什么影响。