promethium

英式音标：[prəˈmi:θiəm]

美式音标：[prə'miθɪrm]

词汇分类：元素周期表,Word Menu

概况：

n. [化学] 钷（稀土金属元素）

词义：

n.

钷（元素符号为：Pm）；

英英释义

promethium[ prəu'mi:θiəm ]

n.a soft silvery metallic element of the rare earth group having no stable isotope; was discovered in radioactive form as a fission product of uranium

同义词：Pmatomic number 61

用法：

权威例句

Promethium

Promethium

Promethium

Technetium and promethium

Construction of a promethium-147 atomic battery

Stellar Neutron Capture on Promethium: Implications for the s-Process Neutron Density

Nuclear Spins of Neutron-deficient Promethium, Samarium, Europium and Gadolinium Isotopes

Sparkle/AM1 Parameters for the Modeling of Samarium(III) and Promethium(III) Complexes

Synergistic extraction of neodymium and carrier-free promethium by the mixture of HDEHP and PC88A

The response of murine intestinal crypts to short-range promethium-147 beta irradiation: deductions concerning clonogenic cell numbe...

Radiochemical Separation of Fission Products from Large Volumes of Sea Water. Strontium, Cesium, Cerium, and Promethium

Atomic energy levels: The rare earth elements (the spectra of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, euro...

Crystal growth method of oxide, cerium oxide, promethium oxide, multi-layered structure of oxides, manufacturing method of field eff...

同义词：illinium

英语词源：

promethium (n.)

radioactive element, long one of the "missing elements," 1948, so called by discoverers Jacob Marinsky and Lawrence Glendenin, who detected it in 1945 in the fusion products of uranium while working on the Manhattan Project. From Prometheus, who stole fire from the gods and was punished for it, + element name ending -ium. "The name not only symbolizes the dramatic way in which the element may be produced in quantity as a result of man's harnessing of the energy of nuclear fission, but also warns man of the impending danger of punishment by the vulture of war." [Marinsky and Glendenin]

造句：

1. An unruly mob broke down police barricades and stormed the courtroom.

一伙暴徒捣毁了警察设置的路障冲进法庭。

来自柯林斯例句

2. Bottles and cans were hurled on the terraces by the mob.

暴徒向看台扔瓶子和罐子。

来自柯林斯例句

3. A mob of women laid into him with handbags and pointed shoes.

一帮女人用手提包砸他，用鞋尖踢他。

来自柯林斯例句

4. They have been exercising what amounts to mob rule.

他们一直在实行相当于暴政的统治。

来自柯林斯例句

5. The inspectors watched a growing mob of demonstrators gathering.

督察们看见越来越多愤怒的示威者聚集到一起。

来自柯林斯例句

[ mob 造句 ]