And he was poisoned by radioactive polonium. He died the slow agonizing death in 2006.

他被放射钋毒杀。在2006年缓慢又痛苦地死去。

British officials said they added radioactive polonium to his tea.

英国官员称他二人在利特维年科茶中放入了放射钋。

It was being warmed by radioactive elements in the granite that formed in the solidified magma chamber below.

在下面凝固的岩浆腔中形成的花岗岩中的放射正在给它加热。

Everywhere are traces of the sudden appearance of rare radioactive elements like plutonium, a legacy of nuclear weapons.

到处都有迹可循的是诸如核武器或燃料等设备中才涉及到的钚这类放射的突然微量出。

As a radioactive element decays, the individuals atoms split into multiple, but when that happens the reaction also releases energy.

当放射衰变时， 单个原子分裂成多个原子，但当这种情况发生时， 反应过程中也会释放能量。

Since Mars doesn't have easily accessible radioactive elements, the nuclear fuel needs to come from Earth along with the reactor.

由于火星没有易获得的放射，核燃料和反应堆均需要来自地球。

Like her mother, Irene was awarded a Nobel Prize, along with her husband Frederic in 1935, for producing new radioactive elements.

和她的母亲一样，艾琳于1935年，与他的丈夫弗里德里克，因创造了新的放射，共同获得了诺贝。

Let’s start off with another scientist who worked with radioactive elements -- Lise Meitner.

我们从另一位研究放射的科学家开始——Lise Meitner。

So, were there other radioactive elements that might be responsible?

那么，是否还有其他放射可能对此负责？

Bismuth is interesting because it is the heaviest element that is not radioactive.

铋很有趣， 因为它是最重的非放射。

Neutrinos are subatomic particles produced when radioactive elements decay.

中微子是放射衰变时产生的亚原子粒子。

Spinning the pump backward, he took away the radium.

将泵向后旋转, 他取出了放射。

She was getting tiny amounts of radium out of the pitchblende.

她从沥青混合物中提取了少量的放射。

Meanwhile, the whole world was falling in love with radium.

与此同时, 整个世界都爱上了放射。

Let's take a look at what may be the most famous radioactive element, uranium.

我们来看看最著名的放射铀是什么。

They are radioactive elements, they decay.

它们是放射，会衰变。

Well it's fairly simple, given enough time all radioactive elements would decay in to non radioactive forms.

好吧，这很简单，只要有足够的时间， 所有放射都会衰变成非放射形式。

The greatest challenge for a nuclear reactor is to safely contain these products and keep them from harming humans or the environment.

对于一个核反应堆的最大挑战就是安全的存储这些放射并使它们不能伤害到人类与自然。

For example, they discovered radium, which has a great effect on X-ray exposure and cancer treatment.

例如, 他们发了放射, 这对X射线照射和癌症治疗有很大影响。

The entrepreneur asked, is this amount of radium enough?

这位企业家问道, 这么多的放射够用吗?