Significant negative correlations were found between perceived social support and uncertainty.

疾病不确定感与社会支持之间存在显著负相关。

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There were significant negative correlations between score of hope and score of uncertainty as well as its sub-factors(P<0.01).

不确定感总分及各因子得分与希望总分及各因子得分呈显著负相关（P<0.01）。

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There were significant negative correlations between nitrate content and total n, protein n, total p, protein p, protein K of lettuce leaf.

莴笋叶片硝酸盐含量与全氮、蛋白氮、全磷、蛋白磷和蛋白钾含量呈极显著负相关。

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