A broad sense including "dialect drama" and "local opera film" categories.

广义包括“方言剧情片”和“地方戏曲片”两类。

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Firstly, the different definitions of dialect island in the academical circle are introduced and the concept of dialect island is specified in a broad sense in this paper.

学术界目前有关方言岛的定义仍存分歧，本文采用广义上的方言岛概念。

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