| 单词 | cesium |
| 释义 | cesium From Longman Dictionary of Contemporary Englishcesiumce‧si‧um /ˈsiːziəm/ noun [uncountable]the American spelling of caesiumExamples from the Corpuscesium• The definition of a second has since officially been the time it takes a cesium atom to make 9,192,631,770 vibrations.• During irradiation, food is exposed to gamma rays from sources such as cobalt 60 or cesium 137. |
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