而许多独居哺乳动物的脑——例如猫、鹿以及犀牛——则在同时期内发育较为缓慢。

The brains of more solitary mammals, such as cats, deer and rhino, grew much more slowly during the same period.

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高浓度的铅(每分升血液中含铅10毫克以上)会导致脑部和神经系统受损，导致行动和学习能力方面的问题，还可能使发育缓慢。

High levels of lead (at least 10 micrograms of lead per deciliter of blood) can lead to brain and nervous system damage, behavioral and learning problems and sluggish growth.

youdao

这一观点是基于人类奇特而独一无二的认知结构——发育惊人缓慢的前额皮质(pfc)。

This claim hinges on a peculiar and unique feature of our cognitive architecture: the stunningly slow development of the prefrontal cortex (PFC).

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