Part I aimed at giving a introduction of the social and educational background of "the Eight-yearStudy".
第一部分：“八年研究”的背景。主要论述该项实验产生的社会背景和教育背景。
2
An eight-yearstudy of 218 couples found 90 percent experienced a decrease in marital satisfaction once the first child was born.
一项对218对夫妻持续8年的研究发现，90%的夫妻在第一个孩子出生之后，对婚姻的满意度均会下降。
3
A large, eight-yearstudy in Europe shows that eating the recommended servings of fruits and vegetables made people only slightly less likely to be diagnosed with cancer.