... sodium clay ==> 钠质粘粒 sodium cloud ==> 钠云 sodium cobaltinitrate ==> 硝酸钴钠 ...
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artificial sodium cloud 人造钠云
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The positrons, produced by the decay of radioactive sodium, are cooled into a similarly sized cloud of around 1m particles and held in a neighbouring trap.
ECONOMIST: Antihydrogen atoms are captured for the first time
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