These unstable atoms disintegrate spontaneously, some very quickly, others very slowly, but in accordance with unchanging laws which it has never been possible to interfere with.

• 这些不稳定的原子会自发地衰变，有些衰变的很快，有些则很慢，它们的衰变遵循着各种不可改变的规律，而这些规律是不可能受到干预的。