radioactive element

基本解釋

In nature, the element, whose nucleus is unstable and will grows to be nuclear of other element, is called radioactive element.
在自然界，凡原子核不穩(wěn)定，過(guò)一些時(shí)間自發(fā)地變成其它元素原子核的元素，稱為放射性元素。
Radon is a common radioactive element in air, which is strongly harmful to the man's health. Man inhales radon and its daughters mainly from the indoor air.
氡是空氣中常見(jiàn)的放射性元素，其對(duì)人體健康有強(qiáng)的危害作用，人體主要從室內(nèi)空氣中吸入氡及其子體。
In July 1898, Madame Curie and her husband got a great success that they discovered the radioactive element, polonium, which Marie named after Poland.
1898年7月，居里夫人和她的丈夫取得了一項(xiàng)極大的成就-----他們發(fā)現(xiàn)了一種放射性元素，瑪麗以波蘭這一名稱的字頭命名它為釙。

They had been interested in thorium -- a radioactive element that can fuel nuclear reactors but not be processed into weapons.
World War Two ended. Enrico Fermi had been the first to use a neutron to produce the radioactive change of one element to another.

When the Sun becomes more active, this isotope becomes more abundant along with beryllium, another radioactive element.
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Litvinenko wound up dead in London from poisoning with an exotic, highly radioactive element called Polonium 210 widely believed to have come from Russia.
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