In Vieux Coquelles, a village a beet field away from the French terminal near Calais, Clotaire Fournier walked into his farmhouse. 

a village a beet field away from the French terminal near Calais是Vieux Coquelles的同位语。a beet field away from the French terminal near Calais是一个副词短语，作a village的后置定语。其中 a beet field是修饰away from的。。

away from+地点，意为远离该地点。如果需要说明离那个地点由多远，可以用数词+名词结构修饰away from. 例如：

The school is far away from my home. 学习离我家很远。

The school is 5 miles away from my home. 学校离我家有5英里。

The school is a beet field away from my home. 从我家穿过一片甜菜地就是学校。

a village a beet field away from the French terminal near Calais

与卡莱斯附近的法国终点站相隔一片甜菜地的一个村庄

away from+名词可以分析为一个副词短语，也可以分析为一个复合介词短语。