A: I need to change the wheel of my car, I have a flat.
B: I’ll help, do you have a jack ?
jack n. 千斤顶
vt. 1. 用千斤顶顶起；2. 停止，放弃；3. 提高，增加
A: What type of stone is your ring?
B: It is jade, quite rare.
jade n. 1. 玉，翡翠；2. 浅绿（色）
A: Did you understand the article I gave you?
B: No, there was too much jargon and terms that I had not seen before.
jargon n. 术语，行话
A: I’m going to rent a jeep for the weekend and drive to the mountains.
B: Great idea, can I come?
jeep n. 吉普车
A: No, I’m not going to cheat on the exam.
B: Good, there is no point in jeopardising your degree.
jeopardise vt. 危机，损害
A: You nearly hit Andrew on the head.
B: Good thing that he jerked just in time to miss it.
jerk vt. 使猝然一动，猛拉
A: What would you like for your birthday?
B: Some new jewellery would be nice, maybe a necklace.
jewellery n. 珠宝，首饰
A: You’re so small you would make an excellent jockey .
B: Oh, I don’t like horse riding.
jockey n. 1. 骑师；2. [美俚]驾驶员，（机器等的）操作手
vi. (for) 谋取
A: I go for a short jog around the lake every night.
B: You must be very fit.
jog v. / n. 1. 慢跑；2. （尤指不正当地）轻轻碰撞
jog sb.’s memory 唤起某人的记忆
A: Mr. Smith has a jolly sense of humour,
B: Yes, I have always found him to be very pleasant.
jolly a. 快乐的，高兴的，愉快的
A: Was the car damaged in the accident?
B: No, it just got a slight jolt . There was no damage done.
jolt vt. 1. 使颠簸，使摇晃；2. 使震惊
n. 1. 震动，摇动，颠簸；2. 震惊
A: The judicial proceedings will take place after all the evidence has been collected.
B: How long do you think that will take?
judicial a. 1. 司法的，法庭的，审判的；2. 明断的，公正的
A: Shall I pour the milk into a jug ?
B: Yes, if you can find a clean one!
jug n. 1. 大罐，壶；2. 一大罐（壶）的容量
A: I’m trying to juggle two jobs at once.
B: That must be difficult, how do you manage?
juggle v. 1. （用球等）玩杂耍；2. 尽力应付，力图平衡；3. 篡改（数字等）以图掩盖