慢速英语:Cleveland, Philadelphia Increase Security for Political Conventions

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grant –​ n. public money that is given to someone or something for use on a project or for a particular purpose

civil disobedience – n. refusal to obey laws as a way of forcing the government to do or change something

altercations – n. noisy or angry arguments

cyber-attack – n. an attempt by a computer hacker to damage or destroy a computer network or system

disruption – n. an event that causes something to be unable to continue in the normal way

hackers – n. people who secretly get access to a computer system in order to get information or cause damage