warranty 和guarantee的区别

warranty 和guarantee的区别
请问这两个词有什么区别啊?

warrant
n.授权,正当理由,根据,证明,凭证,委任状,批准,许可证
vt.保证,辩解,担保,批准,使有正当理由
pl.war.ran.ties;
【复数】 war.ran.ties;
Official authorization,sanction,or warrant.
授权,批准官方授权、批准或认可
Justification or valid grounds for an act or a course of action.
依据为某一行为或某项事业提供支持证明其有效之事（物、言辞等）
Law
【法律】
An assurance by the seller of property that the goods or property are as represented or will be as promised.
保证货物卖主所作的货物同样品无差别或与许诺相同的保证
The insured's guarantee that the facts are as stated in reference to an insurance risk or that specified conditions will be fulfilled to keep the contract effective.
合同担保关于被保的风险如实或为保证合同有效而设立的条件将全部执行的保证
A covenant by which the seller of land binds himself or herself and his or her heirs to defend the security of the estate conveyed.
地产契约土地卖主作出的他（她）本人及他（她）的继承人受法律约束以保护转让地产的安全契约
A judicial writ; a warrant.
法庭书面状；委任状
A guarantee given to the purchaser by a company stating that a product is reliable and free from known defects and that the seller will,without charge,repair or replace defective parts within a given time limit and under certain conditions.
保修证书公司给予买者的一种证明书,写明某产品质量可靠,如有损坏,卖主在一定期限内和一定条件下将免费维修或更换损坏的故障部分
guarantee
n.保证,保证书,担保,抵押品
vt.保证,担保
Something that assures a particular outcome or condition:
担保物保证某一特殊结果或条件的东西：
Lack of interest is a guarantee of failure.
缺乏兴趣肯定会导致失败
A promise or an assurance,especially one given in writing,that attests to the quality or durability of a product or service.
担保一种字据或保证,通常为书面的,以保证某种产品或服务的质量或耐用性
A pledge that something will be performed in a specified manner.
保证对某事将以某种特定方式完成的保证
A guaranty by which one person assumes responsibility for paying another's debts or fulfilling another's responsibilities.
抵押品一种约束某人还债或承担某种责任的抵押品
A guaranty for the execution,completion,or existence of something.
保证物保证某事的实施完成或存在的物品
A guarantor.
保证人
guarantee
v.tr.
guar.an.teed; guar.an.tee.ing; guar.an.tees;
To assume responsibility for the debt,default,or miscarriage of.
担保承担债务,违约或计划失败的责任
To assume responsibility for the quality or performance of:
品质保证承担物品质量或性能的责任：
guarantee a product.
保证产品的质量
To undertake to do,accomplish,or ensure (something) for another:
承诺,保证保证为某人去做（某事或获得某物）：
guaranteed to free the captives; guarantees freedom of speech.
保证释放犯人；保证言论自由
To make certain:
确定,落实：
The rain guarantees a good crop this year.
这场雨保证了今年有好收成
To furnish security for.
为…提供担保
To express or declare with conviction:
管保以肯定的态度表示或宣称：
I guarantee that you'll like this book.
我管保你会喜欢这本书