This radioactive form of nitrogen does not occur in nature.
氮的这种放射性形式在自然界中不会产生。
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Nitrogen is the most common gas in the earth's atmosphere, and at a nuclear plant the main radioactive form is known as nitrogen-16.
氮是地球大气中最平常的气体，它在核电站中的主要放射性形式被叫做氮16。
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