| 词汇 | uranium |
| 释义 | uranium noun[ U ] uk /jʊəˈreɪ.ni.əm/ us /jʊˈreɪ.ni.əm/(symbolU) a chemical element that is a heavy, radioactive metal, used in the production of nuclear power and in some types of nuclear weapon铀 Chemical elements actinium alkali metal americium astatine berkelium brimstone bromine calcium fluorine germanium iodine lithium manganese nickel plutonium quicksilver selenium silicon sodium transition metal uranium | American Dictionaryuranium noun[ U ] us/jʊˈreɪ·ni·əm/ physics a heavy metal that is radioactive and is used in the production of nuclear power and nuclear weapons Examples of uraniumuranium This is no doubt related to the increased interest in gas centrifuges as a means of separating uranium isotopes. It has therefore been concluded that, it is necessary to develop an alternate target design for such high intensities of the uranium beam. Uranium content, determined from the spectral gamma-ray, attains its highest concentrations in this lithology. Previous experiments with the short chamber used other kinds of ions, for example gold and uranium. Uranium is very susceptible to oxidation, which is bad for two reasons. Most likely the organic matter is derived from the carbon- and uranium-rich bituminous shale of the target. The uranium solution was a twofold dilution of a saturated solution. Uranium is also important to the development of nuclear power in an advanced civilization. Within 15-30 s an equal amount of uranium acetate solution was dropped on the sample. The uranium could be derived from the shale or from the granite itself. A major omission for geologists exploring in 2006 is the general lack of discussion of iron, manganese, nickel, uranium and tungsten deposits. Lower uranium contents of the less organic-rich mudstones indicate that oxygen levels were probably increased during their deposition. Consequently, uranium is not used for petrogenetic interpretation in this study. Erosion of the granites yields specific minerals including quartz, radioactive (uranium-, thorium-bearing) phases and phosphates, which could play a role in early evolution. In analogy, the macroproperty of half-life may be attributed to uranium. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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