Rich countries are, by and large, happier than poor ones; but among developed-world countries, there is only a weak correlation between happiness and GDP.

总的来说，富国比穷国幸福；但是发达国家，幸福和GDP之间只有微弱的相关性。

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The experiments results show that there is weak correlation between personality and English learning.

实验结果表明：性格与英语学习是一种弱相关。

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There exists a rather weak correlation between China's trade balance and the RMB exchange rate in the long term.

经济学中长期争论的一个问题是：固定汇率是否优于浮动汇率？

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The correlation is negative, but strangely weak, at -0.10.

FORBES: The Baseball Enigma

However, as Geoffrey Dicks at Novus Capital markets pointed out recently, short-term, the correlation with the official data is pretty weak.

BBC: Britain's zig-zag economy

Specifically, the correlation between winning and payroll was relatively weak in 2010.

FORBES: Baseball's Most and Least Efficient Teams for the 2010 Season