This is because, according to the laws of quantum mechanics, it is possible to have transitions between two states, even in the presence of an energy barrier separating the two states, and the phenomenon is called, quite appropriately, quantum tunneling.
因为 根据量子力学 两种状态下的转化 是可以实现的 即使是处在能量屏障出现 分割两种状态的情况下 而这种现象 被恰如其分地称为量子隧道