Engaging and original, this book offers a pathbreaking new account of language acquisition, varia- tion and change.

极权威性和原始性，这本书独辟蹊径地提供了语言获得、变异和变新途径。

He was brilliant—a prodigy who graduated from Yale at 18, a pathbreaking scholar and a devoted and generous teacher.

一个18岁就从耶鲁毕业天才，一个有着开拓精者和一个专注慷慨教师。