warranty
/ˈwɔrəntɪ; ?@ ˈwɔ:r-; `wɔrəntɪ/ n
1 [C, U] (written or printed) guarantee, esp one given to the buyer of an article, promising to repair or replace it if necessary （商品的）保证书, 保单, 保证
It is foolish to buy a car without a warranty. 购买没有保单的汽车是愚蠢的.
The machine is still under warranty. 这台机器仍在保修期内.
2 [U] (fml 文) authority 权威; 根据
What warranty have you for doing this? 你这样做有什麽根据?