She had often carried test tubes containing radioactive isotopes in her pocket, remarking on the pretty blue-green light they gave off.

她经常把装有放射性同位素的试管放在口袋里，对试管里发出的漂亮的蓝绿光赞不绝口。

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About the same time, though, scientists realized comets might contain decaying radioactive isotopes that could have warmed cometary interiors to temperatures that caused the interiors to evolve.

然而，大约在同一时间，科学家们意识到彗星可能含有衰变的放射性同位素，这些同位素可能使彗星内部的温度升高到导致内部进化的温度。

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Once the reactor has shut down, there remains "decay heat" from traces of other radioactive isotopes.

一旦反应堆关闭，它仍热存在有来自其他放射性同位素踪迹的衰变热。

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Once the reactor has shut down, there remains "decay heat" from traces of other radioactive isotopes.

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Biological organisms absorb and store radioactive isotopes incorporated in the tissues that make up the organisms.

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BUT, if you drink it -it is actually INSIDE you and the radioactive isotopes are incorporated into your cells.

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