The transition into puberty is a critical developmental period, associated with many biological, cognitive and social changes.
童年期向青春期的转变阶段是发育的关键时期，生理、认知及社交等方面随之发生许多变化。
2
Mercury is a well-known neurotoxin that can cause cognitive and developmental problems, especially in fetuses and children.
汞是一种有名的神经毒素，能够引起认知和发育方面的问题，特别是胎儿和儿童。
3
We exposed rats to lead at different developmental stages in order to determine the sensitive periods of the exposure and to test the spatial cognitive abilities of rats in the Morris water maze task.