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
a radioactive element of the actinide series; found in uranium ores.
锕类的放射性元素，见于铀矿中。
a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead.
一种存在周期短的放射性金属元素，由铀形成，能分裂成锕然后分裂成铅。
actinide chalcogenide
锕系元素硫族元素化合物
One study in 2004 estimated leatherback turtles had only a 50 percent chance of avoiding being accidentally snared by a deep sea fishing line each year.
甑囊幌钛芯抗兰疲?磕旮锕杲鲇
The Reform of Waste Disposal Management in Beiping City in the 1930’s
甏?谋逼匠鞘形畚锕芾砀母
European Rare-Earth Actinide Society (ERES)
欧洲稀土金属和锕元素协会
Since the unstable nuclei exist between actinides, including thorium and stable nuclei like lead and bismuth, explosive events such as supernovae are required to produce actinides.
自不稳定核之间存在着锕系元素,包括钍和稳定核像灌了铅,铋,爆炸性事件,如超需出示锕.
Any of a series of chemically similar, radioactive elements with atomic numbers ranging from89(actinium)through103(lawrencium.
锕类任何化学性质相似，原子序数在89（锕）与103（铹）之间变化的放射性元素
Actinide: Any of the series of 15 consecutive chemical elements in the periodic table from actinium to lawrencium (atomic numbers 89-103).
锕系:周期表中从锕到铹(原子序数89～103)的十五个依次排列的一组化学元素。
The fission barrier parameters for actinide nuclei were obtained by analysis and calculations of fission cross-sections and complete neutron reaction cross sections.
通过分析和计算锕系核裂变截面和全套中子反应截面获取了一组锕系核的裂变位垒参数.
Pitchblende and chalcolite are much more radioactive than uranium itself.
沥清铀矿和铜铀云母比纯铀的放射性强得多。
Note3: Actinide abundance ratios may be applied to measurements of stellar ages.
注3:锕充足比率可用于测量恒星的年龄.
In2000, She began to initiate the pla n of“ Beijin Shangyuan Art Museum” and“ China modern Architecture Art Scene”， and in the same time she wrote novel“ Construction story”.
昕?甲橹?呋?氨本┥显芬帐豕荨焙汀爸泄?执?ㄖ?┪锕荨
In2000, She began to initiate the plan of“ Shangyuan Art Museum” and“ China modern Architecture Art Museum”， and in the same time she wrote novel“ Construction story”.
昕?甲橹?呋?吧显废执?帐豕荨焙汀爸泄?执?ㄖ?┪锕荨保
a radioactive element of the alkali-metal group discovered as a disintegration product of actinium.
一种碱金属属的放射性元素，是锕瓦解的产物。
Actinides are synthesized very quickly in such environments as supernova explosions.
锕合成很快,在这种环境下,因为超新星爆炸.
a series of 15 radioactive elements with increasing atomic numbers from actinium to lawrencium.
15个从锕到铹的原子量递增的放射性元素。