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钠
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钠natrium sodium 【医】 Na natrium natrum sodii sodio- sodium 钠(1)鈉nà(2)一种银白色的软的、蜡状而有延展性的金属元素,原子序数11,其化学性质很活泼,用在钠蒸气灯中,尤其在内燃机用的致冷阀中作为一种传热剂 [sodium]――元素符号Na
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