It is thought that they receive more exposure to pesticides during the first few months of pregnancy - a critical time for brain development.
据认为，这是因为这些小孩在孕期的头几个月接触更多的杀虫剂所致，而这几个月正是大脑发育的关键时期。
It is thought that they receive more exposure to pesticides during the first few months of pregnancy - a critical time for brain development.
据认为，这是因为这些小孩在孕期的头几个月接触更多的杀虫剂所致，而这几个月正是大脑发育的关键时期。
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