| 单词 | polonium |
| 释义 | polonium (once / 123118 pages) n WORD FAMILY polonium USAGE EXAMPLESDuring the meeting with May, Litvinenko called for personal sanctions to be imposed on Russian officials who helped organise the complex polonium plot. The Guardian(Nov 23, 2016) After Henri Becquerel discovered the radioactivity of uranium in 1896, Marie and Pierre Curie discovered even more radioactive elements polonium and radium. Time(Sep 15, 2016) The team’s proposed name follows suit with other atomic elements like polonium named after Poland, francium after France, and americium after the United States. Time(Jun 09, 2016) n a radioactive metallic element that is similar to tellurium and bismuth; occurs in uranium ores but can be produced by bombarding bismuth with neutrons in a nuclear reactor Syn|Hyper Po, atomic number 84 metal, metallic element any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. |
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