词典释义：
a written guarantee, issued to the purchaser of an article by its manufacturer, promising to repair or replace it if necessary within a specified period of time
（商品）保单，保用书，保修单
-
the car comes with a three-year warranty 该车有三年的保用期
-
[mass noun]
as your machine is under warranty, I suggest getting it checked .你的机器仍在保用期内，所以我建议把它送去检查一下。
(in an insurance contract)an engagement by the insured party that certain statements are true or that certain conditions shall be fulfilled, the breach of it invalidating the policy
（保险合同用语）（被保险人对某些陈述所作的）保证，担保。
[mass noun][usu. with negative]
〈古〉 正当理由；依据
-
you have no warranty for such an audacious doctrine .对于这样大胆的学说，你缺乏相应的依据。
"Middle English： from Anglo-Norman French
