Complex sentence: Infrastructure systems provide the fundamental engineering and physical framework that underlies the operation of a national economy and society, including sub-systems such as water, power, transportation, standards, codes and regulatory policy environments.
Split into simpler sentences: Infrastructure systems provide the fundamental engineering and physical framework that underlies the operation of a national economy and society. These systems deliver services such as water, power, and transportation, and provide a regulatory framework in the form of standards, codes and regulatory policy environments.