是可数的。infrastructures

n. 基础结构; 基础设施( infrastructure的名词复数 ); 行政机构; 秘密机构;

相关介绍

[例句]Health services and infrastructures in that country were already weak before the earthquake struck.

在发生地震之前，该国的卫生服务和基础设施已很薄弱。