1. Composational. 2. largely arbitrary combination of sound and meaning at the morpheme level and, to some extent, at the word and phrase levels as well.

两个因素都从本质上有助于增强语言表达新概念新思想的潜力，同时又在操作上相互冲突。任何语言都要在这两个因素之间寻求一种自然平衡。