the difference between competence and performance! 语言学方面的问题！

http://everything2.com/e2node/competence%2520vs.%2520performance

Totally different words.
Competence means qualification or capacity for doing something like a job.
有关胜任的能力
a man of competence a test of competence
Preformance means execution or accompishment of something like a job.
有关表现如何
someone's best preformance a high-quality preformance
例句：
This musician of confidence competence and passion is giving his best preformance in the theatre.

competence refers to the knowledge of language.or the ability of cognition to knowledge.

performance refers to the atual use of language

The limitations of current language processing systems are not surprising: they follow immediately from the fact that these systems are built on a competence-grammar in the Chomskyan sense. As mentioned abov