jamb on door or window

例句：

1. 1. The door jamb is damaged beyond repair.
   门的门槛被损坏得无法修复。
2. 2. The car was parked in front of the house with its door jamb blocking the street.
   汽车停在房子前面，车门门槛挡住了街道。
3. 3. The builders had to remove the old door jamb and replace it with a new one.
   建筑工人不得不把旧的门门槛拆掉，换上一个新的。