这种意想不到的影响，与媒体对冲突的描述、以及学龄前儿童对这种冲突的理解有关。
This unintended impact has to do with the portrayal of conflict in media and how preschool-age children comprehend that conflict.
目的探讨环境铅暴露对学龄前儿童免疫系统的影响。
Objective To explore the effects of environmental lead exposure on immune system in preschool children.
近期来自英国的研究发现，学龄前儿童的饮食会影响他们上学后的表现。
New research from the UK is suggesting that children's diets in the pre-school years affects how they perform at school later on.
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