Among the selection criteria for the new polyurethane were that the material exhibited a combination of good wear characteristics and mechanical properties, was easy to handle, and provided for fast, easy alteration and repair of polyurethane as well as metal patterns.
A linguistic universal is a pattern that occurs systematically across natural languages, potentially true for all of them. For example, All languages have nouns and verbs, or If a language is spoken, it has consonants and vowels.
Definition. theoritical biological predisposition in humans in which language switches are thrown as children experience their language; this theory contests that all human languages have a universal grammar (nouns, verbs, adjectives, etc.). Term.