And it's thought that the brain loses some of its plasticity after this lateralization.

人为大脑在这种侧化后会失去一些可塑性。

The fact that language involves both types of functions while lateralization develops gradually with age, has lead to the critical period hypothesis.

事实上，语言和左右脑两边的功能都有关连，随年纪增长，大脑发展会侧重一边，这是关键期假说的来由。

This illustrates certain themes that are discussed in detail in the Gray book, concerning the lateralization of different parts of different mental capacities, some in the left hemisphere, some in the right hemisphere.

这说明了灰皮书中论的某些主题，涉及不同心智能力的不同部分的偏侧化， 一些在左半球， 一些在右半球。