So, if the R0 is below 1, the infection peters out; if it's one, it stays steady.

若R0<1，播将逐渐减弱；若R0=1，播规模将维持稳定。

However, at that point nuclear fusion no longer releases enough energy, and the pressure from the core peters out.

并支持它们快 最终变为铁或镍，然而 当核聚变不再释放能量时。