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
vi. 猝然一动
n. 急推，急拉，急扭
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
vt. 劝说，诱使
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
ad. 很，非常
vt. 劝服，哄
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
vi. 颠簸，摇晃
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
a: there is a jumbo edition of the magazine out this week.
b: are you sure you will have time to read it?
jumbo
a. 特大的，巨型的
n. 大型喷气式飞机
a: the traffic lights on the main junction are out this week.
b: are you sure you will have time to read it ?
junction
n. 联结点，（道路等的）会合点，枢纽
a: what are you doing in your room?
b: i’m trying to clear it of all the junk i have collected over the years.
junk
n. 废旧物品，破烂
vt. 丢弃，废弃
a: what are you doing in this part of town?
b: sir, it is my new jurisdiction .
jurisdiction
n. 1。司法权，审判权，裁判权；2。权力，管辖权； 3。权限，管辖范围
a: sorry, sir, my dog ate my homework.
b: that is not adequate justification for being late again.
justification
n. 正当的理由，借口
a: john was taken to the juvenile court for the hearing.
b: oh, that is right he is only 14 and too young to be on trial in the central court.
juvenile
a. 1。少年的，少年特有的；2。幼稚的，不成熟的
n. 未成年人，少年