translation.en: You can also see that there is a gap of almost three and a half school years between 15-year-olds in Shanghai and 15-year-olds in Chile, and the gap grows to seven school years when you include the countries with really poor performance.
translation.zh: 从表中明显一个巨大的差距在于： 在受教育程度方面， 在15岁年龄阶层，上海的孩子比和智利孩子平均多受了3年半的教育, 如果算上其它教育更落后的国家，