An agreement by which one person assumes the responsibility of assuring payment or fulfillment of another's debts or obligations. 保证书某人为承担保证付款或为他人履行债务或其他义务等责任而签定的条约
The new management is assuring its patron of its best effort and hospitality. 新的管理组织将保证为顾客提供最优质的服务。