And the heavier oxygen from a natural process that left more of the light isotope in the part of the nebula that made the sun.

重量较大的氧来自某种自然过程，在此过程中，大部分的轻同位素留在了形成太阳的部分星云中。

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Scientists say the excess heavy nitrogen could have come from a comet. And the heavier oxygen from a natural process that left more of the light isotope in the part of the nebula that made the sun.

科学家认为重氮来自一颗彗星，而重氧则是来自行星形成的自然过程，这一过程把更轻的氧同位素留在了星云中，形成了太阳。

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The rare gas isotope geochemical analyses also support that there is a genetic association between the light rare earth element mineralization and mantle processes.

稀有气体同位素地球化学研究也在一定程度上揭示了牦牛坪轻稀土矿化与地幔过程之间存在着成因关系。

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Their work there was aimed at separating the light, fissile isotope of uranium (useful for making bombs and reactors), from its more abundant, but less useful, heavy cousin.

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The isotope is engineered to bind to carcinoids, and any such bindings light up like beacons on the images.

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