VOA慢速英语:美国加州枪击案 枪手射杀3人

authorities –n. persons in command; government officials

assault-style rifle –n. a large gun that can shoot many bullets but is not fully automatic

randomly –adv. done without a plan or pattern

festival –n. an often periodic celebration or program of events or entertainment having a specified focus

detector –n. a device for finding the presence of electromagnetic waves or of radioactivity

respond –v. to do something as a reaction to something that has happened or been done: to have a particular reaction to something

confusion –n. a situation in which people are uncertain about what to do or what is going on

associated –adj. related, connected, or combined together

gang –n. a group of persons working to unlawful or antisocial ends