"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

Because everybody knows the story from their childhood and just takes you back.

因为人人都从小就知道这个故事，就让你想起童年。

广告泛滥 - SpeakingMax英语口语达人

Peterson says an early childhood education class got her thinking about ways to incorporate more activity into their school day.

VOA: standard.2010.06.25