... critical kill dilution 释义：临界杀菌稀释度 critical exposure time 释义：安全暴露时间 critical volume theory 释义：临界容积学说 ...
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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。
Their bodies are rapidly growing and developing, so exposure to harmful chemicals can cause maximum damage at this critical time.
由于他们正处于身体发育的快速成长期，在这样的关键时期，有害的化学物品更会对他们造成无法挽回的伤害。
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