Language expert Charles Earle Funk said the expression was first used almost seven hundred years ago.

VOA: special.2010.01.31

As an expert in teaching, could you give us some advice on how best to study a language?

作为一名教育专家，关于怎样才是学习语言的最佳方式，你能给我们一些建议吗？

要继续努力 - SpeakingMax英语口语达人

Language expert Barry Popik studied the question and wrote about it on his Web site.

VOA: special.2009.12.27

Language expert Barry Popick says on his web site that Chicago was called a "windy city" because of the wind that blows off of Lake Michigan.

VOA: special.2010.01.10

One language expert says that deep six is the bottom of the ocean.

VOA: special.2009.05.24

Portland State University language expert Tucker Childs attended the event.

VOA: special.2009.12.02

But his expert knowledge of the music and its performers helped make jazz an international language.

VOA: special.2009.01.30