correlation

the correlation of brain size and/with intelligence脑大小与智力高低的相互关系

the high/strong correlation between poverty and crime [=the fact that crime is more common when there is more poverty]贫穷与犯罪的高/强相关

Researchers have found a direct correlation between smoking and lung cancer.研究人员发现吸烟与肺癌直接相关。

She says that there's no correlation between being thin and being happy.她说胖瘦与幸福感无关。