其中右边的一个上标有辐射标志。
乞力马扎罗山峰冰雪消融的标志是在20世纪50年代早期开展的原子能测试产生辐射尘的放射性特征。
One marker of ice loss on Kilimanjaro was the radioactive signature of fall-out from atomic tests carried out in the early 1950s.
这种强辐射是爆发持续了一分钟之久的伽马射线的一部分,这标志着一颗超大质量恒星的死亡同时将自己转变成一个黑洞。
The intense radiation was part of a gamma-ray burst that lasted a minute and which marked the death of a massive star transmogrifying itself into a black hole.
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