VOA慢速英语:大规模的枪击事件大多发生在美国的小城镇

suburban – adj. living in or relating to a community near a big city

detection – n. the act of discovering or confirming the presence of something

tend – v. to be likely; to pay attention to

psychologist – n. someone who studies the human mind and behavior

dump – v. to let fall or drop

type – n. kind or group

associate – v. to join or connect together

gang – n. a group of criminals

rifle – n. a gun that has a long barrel and has a greater chance of hitting a far-away target

association – n. a group of organization