demarcated造句

Plots of land have been demarcated by barbed wire.
一块块土地都用带刺的铁丝网圈了起来。

The two provinces are demarcated by a river.
两省以河流分界.

Work areas were not sharply demarcated but extremely fluid and changing.
工作范围并无明显区分,但流动性极大.

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