单词	cesium
释义	cesiumce‧si‧um /ˈsiːziəm/ noun [uncountable] Examples EXAMPLES FROM THE CORPUS During irradiation, food is exposed to gamma rays from sources such as cobalt 60 or cesium 137. The definition of a second has since officially been the time it takes a cesium atom to make 9,192,631,770 vibrations. the American spelling of caesium
随便看	planer planet planetarium planetary Planet of the Apes plane tree Planets, The plangency plangent plangently plank planking plankton planned obsolescence Planned Parenthood planner planning planning permission plant Plantagenets plantain plantation planter plaque plasma

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