VOA慢速英语:美国联邦调查局警告总统就职典礼前可能发生武装抗议活动

inauguration – n. the act of officially putting someone into an important position, or the ceremony at which this is done

intelligence – n. secret information about the governments of other countries or the activities of certain groups

focus – v. to center attention on something

authorize – v. to give permission for something to happen

accountable – adj. responsible for one's actions

evolve – v. to develop over time