一种放射性元素

Element; discovered by bombarding americium with helium.

一种放射性超铀元素，在用氦轰击镅时发现。

A radioactive transuranic element; discovered by bombarding americium with helium.

一种放射性超铀元素，在用氦轰击镅时发现。注意，注意力集中

A radioactive transuranic element synthesized by bombarding curium with carbon ions; 7 isotopes are known.

一种放射性超铀元素，用碳离子轰击锔而合成，已知有种同位素。

A radioactive transuranic element; discovered by bombarding curium with alpha particles.

一种放射性超铀元素，在用α粒子轰击锔时发现。

Group in the periodic table there are silver-white metallic luster of the solid metal transition element, atomic number Z = 26, atomic weight of 55847, chemical symbol Fe, there is a stable F isotope 5626Fe and a radioisotope 5526Fe, content of 5% of the earth's crust, accounting for elements of in the fourth place, the metal in the second melting point 1535 ℃, boiling point 2750 ℃, the relative density of 786, the external electronic structure 3d64s2, chemical reactions 2-6 tram F-volatile son, oxidation number of 0, 2, 3, 4 , 5 and 6, the chemical nature of the metal element is very lively, in the humid air combined with oxidation, but also directly with the sulfur, phosphorus, silicon, carbon together.

周期表中Ⅷ族有银白色金属光泽的固体金属过渡元素，原子序数Z＝26，原子量55847，化学符号Fe，有一种稳定F同位素5626Fe和一种放射性同位素5526Fe，地壳中含量5％，占元素中第四位、金属中第二位熔点1535℃，沸点2750℃，相对密度786，外围电子结构3d64s2，化学反应时易丢失2—6个电F子，氧化数为0、＋2、＋3、＋4、＋5和＋6、化学性质很活泼的金属元素，在潮湿空气中能与氧化合，也能直接与硫、磷、硅、碳化合。

In reality the proportion of the hypothetical element was far lower and it took several years to show unequivocally that ''.'pitchblende'.

实际上这种假设中的元素的浓度要小得多，我们花了几年时间才明确无误地证明沥青铀矿物质中至少含有一种高放射性物质，在化学意义上这就是一种新元素。

In reality the proportion of the hypothetical element was far lower and it took several years to show unequivocally that pitchblende contains at least one highly-radioactive material which is a new element in the sense that chemistry attaches to the term.

实际上这种假设中的元素的浓度要小得多，我们花了几年时间才明确无误地证明沥青铀矿物质中至少含有一种高放射性物质，在化学意义上这就是一种新元素。

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。

Radon is the crust of rock, soil radioelement arising from the decay of a radioactive inert gases, which are mainly the lungs and bronchial have on the human body radiation.

氡是地壳岩石、土壤中放射性元素衰变而产生的一种放射性惰性气体，它主要是对人体的肺和支气管产生辐射作用。

In 1898, the Curies obtained a new element, whose radioactivity was several million times stronger than that of uranium.

1898年，居里夫妇获得了一种新元素，它的放射性比铀强几年居里夫妇获得了一种新元素，百万倍。

Means the parent directory, so this command means to execute "toolchain.sh," which is in the current directory.

代表父目录，所以这个命令就是执行当前目录下的"toolchain.sh"。

Yes,In fact,I'm on our city ream.

是的。事实上我是我们市队的。