翻译下列句子: A designer should see as many lines as possible. The piece-goods salespeople are well acquainted with events in the marketplace, and they often have information that can aid a designer in the choice of a fabric or print.
【简答题】N . Chomsky used two different terms to distinguish “the speaker-hearer’s knowledge of his language”and “the actual use of language in concrete situation ”. They are________ and _________.