kettle/ˈket̬.əl/动词(警察)把人群困在一定区域,不让离开/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.她下班回到家,为了沏茶放了水壶。想跟读,去练习