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单词
potassium 40
释义
potassium 40
po·tas·si·um 40 (
40
K),
(
pō-tas'ē-ŭm
),
A naturally occurring (0.0117%) radioactive potassium isotope; beta emitter with half-life of 1.26 billion years; chief source of natural radioactivity of living tissue.
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更新时间:2026/8/29 10:00:25