这家公司扩大生产规模后，反而出现了规模不经济，单位成本上升。

The company faced ___diseconomies after expanding production, resulting in higher per-unit costs.

工厂过度集中导致的污染给周边居民造成了严重的经济负担。

Pollution from over-concentrated factories creates serious ___diseconomies for nearby residents.