| 单词 | caesium |
| 释义 | caesium (once / 166470 pages) n WORD FAMILY caesium USAGE EXAMPLESHe has experimented with ions of sodium, potassium, rubidium, caesium, magnesium, aluminium and iron. Economist(Aug 25, 2016) The US government fears that the radioactive caesium could be stolen to make a ‘dirty’ bomb. Nature(May 09, 2016) Of course they offer no protection against other radioactive elements such as caesium-137. BBC(Apr 28, 2016) n a soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal Syn|Hypo|Hyper Cs, atomic number 55, cesium cesium 137 a radioactive isotope of cesium used in radiation therapy 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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