3.to be in a jam
(difficult situation)处于困境；身陷窘境
They were in a real jam.他们遇到大麻烦了。
I'm in a real jam. I've got an important meeting at nine and the car won't start.我麻烦大了。我九点钟有个重要的会议, 但是这车却发动不了。
They were in a real jam, Bob thought glumly.他们真是遇上麻烦了, 鲍勃忧心忡忡地想。
4.<英>(sweet preserve)果酱
strawberry jam草莓酱
home-made jam自制的果酱