"Students who gain access to a home computer between 5th and 8th grade tend to witness a persistent decline in reading and math test scores," he said.

“那些在5 ~8年级就开始接触家用电脑的学生往往会在阅读和数学的考试成绩上持续下降。”他说道。

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Thee latter group experienced a 22.5 percent faster decline on their cognitive test scores over the decade than those who were healthy.

比起健康的胖子，后一组研究对象（指还有其它健康问题的胖子）在过去的十年时间里在认知测试中得分下降高达22.5%。 。

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Thee latter group experienced a 22.5 percent faster decline on their cognitive test scores over the decade than those who were healthy.

比起健康的胖子，后一组研究对象（指还有其它健康问题的胖子）在过去的十年时间里在认知测试中得分下降高达22.5%。 。

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