限水组生后一周血清钠水平已恢复正常，未限水组血清钠明显低于正常。

In restricting fluids' infants, the serum sodium level recovered normally after birth one week, but in unrestricting fluids' infants the serum sodium was significantly lower.

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结果表明：忽略加热段内蒸汽温度的轴向变化及蒸汽流动的径向变化，钠热管声速限与实际误差在10%以内。 理论与实验较为吻合。

When the radial component of the vapour velocity and the axial variation of the vapour temperature were neglected, the error of the sonic limit is within 10 per cent.

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其方法检出限低，准确度好，可为进一步研究脐橙与钾、钠、钙、镁、磷等元素的关系提供有价值的分析方法和信息。

The method, featured by low detection limit and high accuracy, can provide valuable references for the further studies on the relationship between navel orange and these elements.

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