| 释义 |
strontium 90n.（名词）- The strontium isotope with mass 90, having a half-life of 28 years, used for its high-energy beta emission in certain nuclear electric power sources and constituting a radiation hazard in fallout.锶90：锶的质量为90的同位素，半衰期为28年，在某种核电能源使用它的高能β放射性辐射体，它的放射性坠尘形成辐射危险
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