Radium is a radioactive element.
镭是一种放射性元素。
Radium is a radioactive element.
镭是个放射性元素。
That essentially means that it uses a radioactive element called americium-241 to spot smoke or harmful gasses.
从字面上可以了解到，它采用放射性元素镅241来探测烟雾或者有害气体。
They had been interested in thorium — a radioactive element that can fuel nuclear reactors but not be processed into weapons.
他们当时对一种放射性元素钍很感兴趣，这种元素能驱动核反应堆，却不能制造生产成武器。
It concerns a cat that is sealed inside a box for one hour along with a radioactive element and a vial of deadly poison.
内容是：一只猫被封闭在一个盒子里一个小时，和它一起的还有一些放射性元素和一瓶毒气。
The undisputed link between the tests and a radioactive element in baby teeth provided much of the impetus for the 1963 test Ban Treaty, which outlawed above-ground nuclear weapons-testing.
试验与婴儿牙齿里放射元素之间的无可争辩的联系对于推动1963年的《禁止核试验条约》起了至关重要的作用。该条约宣布地面进行核武器试验非法。
So if you get an ore of the right type of radioactive element, and you wait millions and millions (or even billions) of years, you make a giant underground store of helium !
所以要是你获得了放射性元素的正确类型矿石后，等上数十亿年（甚至数万亿年）就能获得地下隐藏着的大量氦！
Planetary scientists can determine a rock's age by calculating how many radioactive "parent" isotopes of a particular element have decayed into "daughter" isotopes.
行星科学家们可以通过计算一个特定元素有多少“母亲”放射性同位素衰变为“女儿”同位素来确定岩石的年龄。
This radioactive element has a half-life of some 5, 700 years.
这种放射性元素半衰期约为5700年。
A radioactive transuranic metallic element discovered by bombarding with helium atoms.
一种放射性的金属元素在用氦原子轰击时发现。
He said detection of the radioactive element caesium outside the No.1 reactor today was "a bad sign" for a core meltdown.
他说今天在第一核电站检测到放射性元素铯，这是核心融化的不好迹象。
A radioactive transuranic metallic element produced by bombarding with helium nuclei.
一种放射性超铀元素在用氦核子轰击时发现。
Polonium is a highly radioactive element and a metalloid.
钋是高放射性的元素，金属。
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.
氡是空气中常见的放射性元素，其对人体健康有强的危害作用，人体主要从室内空气中吸入氡及其子体。
A radioactive transuranic element in the actinide series, artificially produced in trace amounts. Its longest-lived isotope is No255 with a half-life of3 minutes. Atomic number102.
锘在锕类元素中的一种放射性超铀元素，人工微量制造，其最长寿命的同位素是锘255，其。
A silvery, metallic synthetic radioactive transuranic element.
一种合成的银色放射性超铀金属元素。
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项极大的成就- - - - -他们发现了一种放射性元素，玛丽以波兰这一名称的字头命名它为钋。
Polonium is a naturally radioactive metallic element.
钋是一种具有天然辐射性的金属元素。
"Platinum" is a powerfully radioactive trace element.
“铂”：非常有辐射力的微量元素。
The thyroid gland readily absorbs iodine in any form, (including radioactive iodine...) and it retains this element as a nutrient for extended periods.
甲状腺容易以各种形式吸收碘(包括放射性碘…)，并作为营养长期保留。
The thyroid gland readily absorbs iodine in any form, (including radioactive iodine...) and it retains this element as a nutrient for extended periods.
甲状腺容易以各种形式吸收碘(包括放射性碘…)，并作为营养长期保留。
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