口語(yǔ)每日一學(xué)：Under oath

It means to promise to tell the truth in court.
     eg: At the trial you will be asked to tell your story under oath.
     Note:
     Under oath在法律上指發(fā)誓講真話(huà)。
     例：在法庭上你必須發(fā)誓所述情況均屬實(shí)。