It shows how difficult it is to manage these enormous institutions.

它表这些庞大的机构是多么困难。

The United States Post Office is a government organization, like most countries, and it is a very large organization.

与大多数国家一样， 美国邮局是一个政府机构，而是一个非常庞大的机构。

And by the mid 90s public housing had exploded from a small agency granting mortgage insurance to a massive program with 1.3 million individual housing units managed by approximately 3,400 housing authorities and a sizable budget.

到90年代中期，公共住房已经从一个提供抵保险的小机构发展成为一个庞大的项目，拥有130万个个人住房单元，由大约3400个住房部门和相当大的预算。