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radioactive clock
释义
radioactive clock
radioactive clock
[
¦rād·ē·ō′ak·tiv ′kläk
]
(nuclear physics)
A radioactive isotope such as potassium-40 which spontaneously decays to a stable end product at a constant rate, allowing absolute geologic age to be determined.
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更新时间:2026/10/19 14:12:48