密集的原子原料沿着预定的路线；

Denser atomic materials followed in due course;

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这会造成核原料所谓的临界质量，当其中的原子在无法控制的连锁反应中***时，能在瞬间开释出能量。

This creates what is known as a critical mass of nuclear material, which releases its energy instantaneously as atoms inside it split in an uncontrolled chain reaction.

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为确定以不同硒含量的大豆为原料生产豆腐过程中硒分布特性，用石墨炉原子吸收分光光度法对该过程中各种产物的硒含量进行了分析研究。

To determine the selenium distributed characteristic in bean curd production process by soybean as the material, the content of selenium in products from this prosess was determined and studied.

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