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	stagnation stag night stag party stagy staid stain stained glass stainless steel stair staircase stairway stairwell stake stakeholder stakeholder economy stakeout stalactite stalagmite stale stalemate staleness Stalingrad Stalinism Stalinist Stalin, Joseph

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