with a killing curse cast by lord voldemort so that the piece of voldemort's soul residing inside him would be destroyed and the dark wizard could be defeated once and for all. this conferred a certain amount of protection on harry's allies, making it so that spells voldemort tried to pce on them, including silencing charms and a full body-bind curse, quickly wore off.
*伏地魔目前还不能直接攻击哈莉，哈莉身上还有莉莉“爱的牺牲”，即使不是死咒，其他由伏地魔放到哈莉身上的咒语失效也很快。
hp wiki原文：when the person to make the sacrifice