human shield
noun [ C ] uk/ˌhjuː.mən ˈʃiːld/ us/ˌhjuː.mən ˈʃiːld/
人体盾牌，人肉盾牌
a person or group of people kept in a particular place in order to stop an enemy from attacking that place
Military bases were protected by captured enemy soldiers who were housed there as a human shield. 军事基地受到由关在那里的敌军俘虏兵组成的人盾的保护。