To add nonfissionable matter to(fissionable material)so as to prevent use in an atomic weapon.
使（核材料）中毒（向可裂变材料中）加入不可裂变物质以防止（这种可裂变物质）用于原子核武器
(i) relating to fissionable materials or the materials from which they are derived;
(1)涉及可裂变物质或从可裂变物质衍生的物质；
The spatial arrangement of fissionable and nonfissionable materials in a nuclear reactor.
栅格在核反应中可裂变和不可裂变的物质的空间排列
fissionable material production reactor
可裂变物质生产反应堆
Fissionable material used in a nuclear reactor.
可裂变物质用在核反应堆中的可分裂性材料
add nonfissionable material to (fissionable material) so as to make unsuitable for use in an atomic bomb.
加入不裂变物质使裂变物质变得不适合于制造原子弹。
To produce(fissionable material) in a breeder reactor.
产生裂变的物质增殖，指在增殖反应堆里产生（可裂变的物质）
cermet ,whether or not wrought (excl. those containing fissile or radioactive substances)
金属陶瓷,无论是否锻造(不包括含有可裂变或放射性物质者)
The amount of material produced during fission is insignificant.
裂变时产生的物质数量是不够的。
fertile thorium 232.
能产生裂变物质的钍232
mass distribution of fission products
裂变产物的质量分布
(physics) not capable of undergoing fission.
（物理学）不易于产生裂变。
In a hole in the center of this system is placed a subcritical sphere of fissionable material.
在这个系统的中心圆洞中放置一枚次临界的球形可裂变物质。
The temperature of a substance may be changed under a variety of conditions.
物质的温度可在不同条件下发生变化。
fission product contaminants
裂变产物裂变污染物
(especially of fissionable material) able to sustain a chain reaction in such a manner that the rate of reaction increases.
（特别是指裂变物质）能够以反应速度不断增加的方式继续连锁反应。
Matter can be transformed into consciousness and consciousness into matter.
物质可以变成精神， 精神可以变成物质。
A substance, such as water or graphite, that is used in a nuclear reactor to decrease the speed of fast neutrons and increase the likelihood of fission.
慢化剂一种物质，如水或石墨在核反应堆中用来减缓中子运动速度和提高裂变可能性的物质