查询词典 uranium-actinium

In the mid 1940s the process to produce uranium- 235 was scaled up from lab to plant with a scale-up factor of 1061.Obviously this is a big risk, but so were the perceived returns.

40年代中期，生产U-235的工艺从实验室规模到工厂规模的放大系数是1061显然这是个大冒险，不过也收到了大回报。

In the mid 1940s the process to produce uranium- 235 was scaled up from lab to plant with a scale-up factor of 1061.Obviously this is a big risk, but so were the perceive d returns.

40年代中期，生产U-235的工艺从实验室规模到工厂规模的放大系数是1061显然这是个大冒险，不过也收到了大回报。

When the metal rods of cadmium were pushed all the way in, and stray neutrons that entered the pile were absorbed, and could not enter uranium—235 nuclei, and so there was no reaction at all.

当镉金属棒全部推入，进入反应堆的流动中子就被吸收，不能进入铀－－235原子核，因而完全没有反应。

Methods Neonate rats were irradiated with a single injection of 2 μl enriched*" 235 uranium( 235 U)into the lateral ventricle of the rat brain on the first day of life(less than 24 hours after birth)at doses of 0,1,5 and 10 μg of*" 235 U,respectively.

新生大鼠侧脑室注射 2 μl浓缩铀溶液后，多方位地观察不同浓度的2 35U对早期生长发育的影响，放射自显影示踪术观察脑内放射性核素行径定位。

Y+ z; u+ C, K5 T+}$ S+}/ f X 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，因为轴的所有原子都会裂变。

But the fear is that the same centrifuges could be reconfigured to make high-enriched uranium for nuclear weapons.

然而国际害怕的是同样的一个离心器可以通过改装，来生产核武用途的高浓缩铀。

The same type of centrifuges can be used to enrich weapons-grade uranium as those needed to make fuel for nuclear power plants.

同一类型的离心机可用于充实武器级铀的需要，使核电厂的燃料。

It is not true, as is sometimes thought, that the high concentration of radium in Brazil nuts is due to elevated levels of the uranium and/or thorium series in the soil in which the tree grows.

其实，不是这样的。

This includes such destructive, degrading and dehumanising practices as clear-felling of old-growth forests, reliance upon battery hen egg and poultry production, and use of depleted uranium in weapons.

这包括诸如破坏性，有辱人格和dehumanising做法，明确砍伐原始森林，依靠电池鸡蛋和家禽生产，使用贫铀武器。

It remains unclear in precisely what manner North Korea will address U.S. concerns over its activities related to Syria and uranium enrichments.

现在还不清楚北韩将如何回应美国对北韩与叙利亚的关系以及铀浓缩问题的关注。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。