t the speaker employs different speech acts to produce interdiscursive relations between different types of speech at the text-genre level in the PLCs. Based on analyzing the corpus, the appropriation of speech acts in the text-internal resources would cause interdiscursivity between different professional practices in text-external resources. Therefore, after understanding the amount of speech act from interdiscursivity and the speakers’ preference for use in PLCs, the phenomenon of interdiscursivity between different professional practices in text-external resources due to the appropriation of resources within the language would also come out. Then, professional culture level, an internal one, is analyzed to find out means that business professionals employ to achieve their objectives. And finally, it explores the functions of the communicative strategy and reasons for interdiscursivity permeating in PLCs. In this chapter, major findings, implications, limitations and suggestions are presented.
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