zhè / gè / xiǎo / zhèn / shì / zhōu / biān / chéng / shì / de / fēi / dì / ， / xíng / zhèng / shàng / guī / lìng / yī / gè / shì / guǎn / xiá / 。

这个小镇是周边城市的飞地，行政上归另一个市管辖。

This small town is an enclave of the surrounding city, and is administratively under the jurisdiction of another city.