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.
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美
- 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。