disseminated patches什么意思

你感觉这句话通顺吗？

你多给点上下文啊。

Multiple sclerosis (MS) is a slowly progressive disorder of the central nervous system (CNS) in which disseminated patches of the brain and spinal cord become demyelinated

disseminated patches字面意思指 播散性（传播性）班， 应该指的是病变部分