冷却水含有新闻报道的两种危险程度最低的放射性物质——放射氮和放射氚。
The water contains two of the least dangerous radioactive materials now in the news - radioactive nitrogen and tritium.
氮的这种放射性形式在自然界中不会产生。
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。
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.
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