Hxen.com's tips：Every day persisted can learn English well!-->■Learn English Everyday■
cyber – adj. related to computers
sovereignty – n. a country’s independent authority and the right to govern itself
dominate – v. to have control of or power over (someone or something)
rivalry – n. a state or situation in which people or groups are competing with each other
pose – v. to be or create (a possible threat, danger, problem, etc.)
challenge – n. a difficult task or problem; something that is hard to do
regime – n. a form of government
infrastructure – n. the basic structures of the internet or a computer system
firewall – n. a computer program or piece of equipment that keeps people from using or connecting to a computer or a computer network without permission (sometimes used figuratively)
