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. The cold weather had most deleterious consequences among the chrysanthemums.

寒冷的天气对菊花产生了极有害的影响.

来自《简明英汉词典》

2. Petty crime is having a deleterious effect on community life.

轻微罪行正对社区生活产生有害影响。

来自辞典例句

3. Exactly why the foreign body is so deleterious is not clear.

异物为什么如此有害,其确切原因尚不清楚.

来自辞典例句

4. In normal seedlings the deleterious recessive genes are not expressed.

有害的隐性基因在正常菌木中不表现出来.

来自辞典例句

5. The oxides of nitrogen can have deleterious effects on materials, vegetation, and animal and human life.

氮的氧化物对物质 、 植物 、 动物和人类生活有毒害效应.

来自辞典例句

[ deleterious 造句 ]