jam 1/dʒæm/
vt., vi.-mm-1. （常与into连用）挤进；塞入to jam various things into a suitcase把很多东西塞进衣箱
The crowds jammed the streets, and no cars could pass.街上挤满了人群，汽车都无法通行。
The bus was jammed full.公共汽车挤得满满的。
2. 夹住；夹伤to jam one's finger in a door手指在门缝里夹伤
3. 使（机器）卡住；使阻塞The door has jammed.门卡住了。
The road is jammed up with motorcars.路上汽车挤得水泄不通。
4. 干扰（电波信号）The enemy's radio was jammed during the war.战争期间敌台被干扰。
5. （常与on连用）猛踩（或猛拉）刹车When I saw the child crossing the road I jammed on my brakes.当我看到孩子正过马路，我猛踩刹车。
He jammed on the brakes to see if they worked.他猛地刹车看看刹车灵不灵。
6. （常与in连用）堵塞