1.
The "trigger" may be a conventional uranium-atom bomb.
这种“引爆器”可以是一枚常现铀原子弹。
2.
Determination of oxygen to uranium atomic ratic in uranium dioxide powder and pellets by thermogravimetric method
GB/T11842-1989二氧化铀粉末和芯块的氧铀原子比测定热重法
3.
The carbon atom has six electrons, and the most complicated atoms, such as those of uranium, have about one hundred electrons.
碳原子中有六个电子，然而，铀原子却含有一百个左右的电子，它是最复杂的原子。
4.
The divalent radical UO22+.
铀酰，双氧铀根二价原子团UO22＋
5.
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。
6.
When an atom of U235 is split,several neutrons are set free.
一个铀235原子分裂时,释放出几个中子。
7.
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
8.
Having an atomic number greater than92.
超铀的原子序数超过92的
9.
a radioactive transuranic metallic element; discovered by bombarding uranium with helium atoms.
一种放射性的超铀金属元素，在用氦原子轰击铀时发现。
10.
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％。
11.
Transuranium element Any of the chemical elements after uranium in the periodic table (with atomic numbers greater than 92).
超铀元素: 周期表中铀以后的任何化学元素(原子序数大于92)。
12.
Chain-reacting piles, or atomic-power reactors, contain a great quantity of uranium
链式反应堆，即原子反应堆含有大量的铀。
13.
Nuclear energy can be obtained by breaking up the nuclei of the heaviest atoms such as those of uranium.
通过分裂最重的原子核，如铀的原子核，就可以获得核能。
14.
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。
15.
any element having an atomic number greater than 92" (the atomic number of uranium); all are radioactive.
原子序数在以后（铀的原子序数）的元素，都是放射性元素。
16.
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。
17.
The uranium may be put into the reactor in the shape of rods, and the rods surrounded with a neutron-slower, or moderator.
可以把铀做成棒状放在原子反应堆内，在铀棒的四周，围一层中子减速剂即节速剂。
18.
In-Situ Studies of Uranium Oxidation by Micro-Raman Spectroscopy and Atomic Force Microscopy
金属铀氧化的显微拉曼光谱和原子力显微镜原位研究