When an atom is split, it releases neutrons
原子裂变时释放中子。
When atoms split, the process is called "fission".
原子分裂时，其过程被称为“裂变”。
We can generate electric power by splitting atoms.
我们可以利用原子核裂变发电。
Fission bombs use highly enriched fuel.
裂变原子弹使用高度浓缩燃料。
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。
a self-sustaining nuclear reaction; a series of nuclear fissions in which neutrons released by splitting one atom leads to the splitting of others.
一种自我维持的核反应；一个原子分裂后释放的中子引起其他原子分裂的一系列核裂变过程。
Some atoms decompose only after being bombarded with high energy particles.
有的原子受到高能粒子轰击之后才会裂变。
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
a nuclear weapon in which enormous energy is released by nuclear fission (splitting the nuclei of a heavy element (uranium 235 or plutonium 239)).
一种由原子核（裂变重元素（铀或钚）的原子核）裂变释放巨大能量的武器。
The energy produced during atomic nuclear fission is great enough to destroy the whole city.
原子核裂变时产生的能量足以摧毁整座城市。
The process in which substances are converted to their constituent atoms is called "cracking".
物质转变为其组成的原子的过程叫做“裂解”。
To make an atomic bomb we have to use uranium 235, in which all the atoms are available for fission.
制造原子弹，我们必须用铀235，因为铀的所有原子都会裂变。
To make an atom bomb we have to use uranium 235, in which all the atoms are available for fission.
制造原子弹必须用铀235，因为它的所有原子都可以裂变。
The Americans successfully split the atom in 1944, preparing themselves for an atomic bomb.
美国在1944年成功地使原子产生裂变，为制造原子弹做好了准备。
To make an atomic bomb we have to use uranium 235, in which all the[/url] atoms are available for fission.
制造原子弹，我们必须用铀235，因为轴的所有原子都会裂变。
The isotope of uranium with mass number235, fissionable with slow neutrons.
锕铀铀的同位素，原子质量数为235，与慢中子发生裂变
Nuclear fission would have been a dramatic discovery at any time.
在任何时候，原子核裂变都会成为引人注目的发现。
Nuclear energy is concentrated, but the fissionable material, uranium 235, is well under 1% of the natural or mined uranium 235.
原子能能量非常集中,但裂变材料铀235在天然铀矿中含量不到1％。