"When we plotted the circuits in the brain against their childhood lead blood lead levels, we found that those with a higher blood lead measurement had less activity in the part of the brain normally left to do the attention tasks,"

VOA: standard.2009.12.19

There it had less to do often with social forms of reform although that's not entirely true than it had to do with the Civil Rights revolution and the Vietnam War.

通常来说,它与改革的社会形态关联较小,但是它与民权革命和越战的关系,也没有人们认为的那么紧密

耶鲁公开课 - 美国内战与重建课程节选