美国向北约提供网络战技术

cyber – adj. related to computers

networks – n. a system of computers and other devices that are connected to each other

infrastructure – n. basic equipment and structures (such as roads and bridges) that are needed for a country, region or organization to work properly

persistently – adv. to continue to do something although it is difficult or other people want you to stop

challenge – v. to test the ability, skill or strength of someone or some group