Now unlike a human-designed computer, where there's a fairly small number of different parts -- we know how they work, because we humans designed them -- the brain is made out of thousands of different kinds of cells, maybe tens of thousands.
人間が設計したコンピュータの 部品の種類は少ないのですが これは我々が設計したので仕組みは分かっていますが -- 脳は数千種類の多様な細胞から出来ています 数万種類かもしれません