na
英[nɑ:, nə]美[nɑ:, nə]
[域] Namibia , 纳米比亚
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- The doublet nature of this and other lines in the Na spectrum indicates a doubling of the expected number of states available to the valence electron
钠光谱中的这条线以及其它线的双重性指出预期价电子可用的状态数是双重的。收藏 - Liu Na runs so fast that nobody can catch her up.
刘娜跑的那样快，谁也赶不上他收藏 - Liu Na is the most active girl in the class.
刘娜是班上最活跃的女孩。收藏 - "Sodium: Chemical element, one of the alkali metals, chemical symbol Na, atomic number 11. A very soft, silvery white metal, the sixth most abundant element on Earth, it occurs mainly as halite, never free."
钠:碱金属族化学元素,化学符号Na,原子序数11。钠是很软的银白色金属。其含量在地球上占第6位,通常以石盐形式存在,不以单体存在于自然界中。 收藏 - Howerer, when alkali content is alike and ASR is effectively inhibited by adding lithium compound, with increasing the Li/Na molar ratio, the inhibitory officieney of LoOH on ASR is raised hardly for the morters made from zeolitization perlite aggregate or Liuhe Aggregate.
相同碱含量条件下 ,对于沸石化珍珠岩和六合雨花石砂浆 ,在有效抑制ASR的前提下 ,随着Li/Na摩尔比增加 ,LiOH对ASR膨胀的抑制效果提高不明显 收藏
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