使由裂变产生的平均能量为2MeV的快中子在与慢化剂的原子核不断碰撞的过程中损失能量，使自己的能量和速度逐渐降低成为热中子，这一过程称为慢化。
n. moderation
misc. slowing down
所有这五个第一代苏联式的水慢化反应堆，都已超期服役或行将退役。 但一个突出的现实问题，将亚美尼亚的核电站与俄罗斯的那四个区别开来。
All five of these first-generation water-moderated Soviet units are past or near their original retirement ages, but one salient fact sets Armenia's reactor apart from the four in Russia.
计算结果表明，中子活化在线分析系统的最优化慢化材料为聚乙烯。
The results lay the foundation for the study of on-line neutron activation analysis system.
巧克力和黄油放在金属小碗中，置于平底锅中热水慢慢化开。避免搅动。
Melt chocolate and butter in a metal bowl set over a saucepan of barely simmering water. Avoid stirring.
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