First of all, the expansion of the notion of critical infrastructure, which was originally coterminous with physical infrastructure alone, and which is being extended more and more to cover practically all critical functions in our societies.
第一点是，关键基础设施原先指的仅仅是有形基础设施，但这个概念已有所扩大，实际上越来越包含社会中的差不多所有的关键功能。