a traffic jam 交通阻塞 apple jam 果酱 He jammed all his clothes into his bag. 塞进
jealous 羡慕的, 妒忌的 be jealous of nobody
join the party , join sb in doing sth
joint 结合处 , 共同的 joint action 联合行动 , joint efforts
play a joke on sb = make fun of sb = play a trick on sb 开…玩笑,取笑
a practical joke 恶作剧 It's no joking .这不是开玩笑。(I am serious)
