Unit 19　Language

　　你会"口语"的同时你懂"手语"吗？请读下面这篇文章吧。

　　Sign Language

　　Sign has become a scientific hot button.Only in the past 20 years have specialists in language study realized that signed languages are unique－a speech of the hand.They offer a new way to explore how the brain generates and understands language，and throw new light on an old scientific debate：whether language，complete with grammar，is something that we are born with，or whether it is a learned behavior.The current interest in sign language has roots in the pioneering work of one rebel teacher at Gallaudet University in Washington，D.C.，world's only liberal arts university for deaf people.

　　When Bill Stokoe went to Gallaudet to teach English，he was given a course in signing.But Stokoe noticed something strange：among themselves，students signed differently from his classroom teacher.

　　Stokoe had been taught a sort of gestural code，each movement of the hands representing a word in English.At the time，American Sign Language (ASL) was thought to be no more than a form of pidgin English.But Stokoe believed the"hand talk"his students used looked richer.He wondered：Might deaf people actually have a genuine language？And could that language be unlike any other on earth？It

　　was 1955，when even deaf people dismissed their singing as "substandard"．Stokoe's idea was academic heresy.

It is 53 years later.For decades educators fought his idea that signed languages are natural languages like English，French and Japanese.They assumed language must be based on speech，the modulation of sound.But sign language is based on the movement of hands，the modulation of space."What I said"，Stokoe explains，"is that