kettles/ˈket̬.əl/名词(警察控制大批街头人群的战术)把人群困在一定区域,不让离开水壶,烧水壶She came home from work and put the kettle on for tea.她下班回家后烧水泡茶。/ˈket̬.əl/动词(警察)把人群困在一定区域,不让离开想跟读,去练习