But none appears to have the combinatorial rule system of human language, in which symbols are permuted into an unlimited set of combinations, each with a determinate meaning. 但是沒(méi)有一個(gè)像人類(lèi)一樣使用復合的規則系統,在這個(gè)系統里面,有無(wú)數的組合形式,每個(gè)組合含有一個(gè)特定的意義。