His research concentrates on sociolinguistics and language planning.
主要研究领域为社会语言学和语言规划学。
Some countries may use only the local language, however, so it's handy to know the written and spoken word for toilet in the language of each country you're planning to travel to.
一些国家可能只用当地的语言，这样，了解每个你要到达的国家如何说和写“厕所”后，就方便了。
Matthew: I've been planning on more language classes, no matter what I study.
马修：不管我要念什么，我都已经打算要上更多的语言课程。
Matthew: I've been planning on more language classes, no matter what I study.
马修：不管我要念什么，我都已经打算要上更多的语言课程。
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