on oath的用法和樣例：
例句
- All witnesses must remember that they have been placed on oath and must speak the exact truth.
所有的證人必須記住一定要保證講真話(huà)，不得有半句謊言。 - He was on oath to tell all he saw.
他已宣誓要把所看到的一切都講來(lái)出。
詞匯搭配
- put someone on oath 使某人發(fā)誓說(shuō)實(shí)話(huà)...
