Her childhood memories were a great source of strength when her mother was killed.母亲被害后，童年的记忆成了她巨大的力量源泉。She has been a great source of strength to me.她一直是我强大的力量源泉。Empowering the underprivileged lies in assuring them that education holds the real source of power.帮助贫困人民就要让他们相信教育是真正的力量源泉。