Jack.
美 [dʒæk] 
英 [dʒæk] 
- n.千斤顶;插座;作动简;起重器
 - v.张拉;用起重器抬起;偷(车)
 - adj.厌烦
 - 网络杰克;杰克琼斯;我叫杰克
 
Jack.
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1.  | [c] 千斤顶,起重器(换车轮时常用)a device for raising heavy objects off the ground, especially vehicles so that a wheel can be changed  | 
2.  | [c] (电)插孔,插座,插口;塞孔an electronic connection between two pieces of electrical equipment  | 
3.  | [c] J 牌;杰克a card with a picture of a young man on it, worth more than a ten and less than a queen  | 
the jack of clubs 梅花杰克  | 
4.  | [c] 靶子球(白色,较其他球小)a small white ball towards which players roll larger balls  | 
5.  | [pl] 抛接子游戏(儿童游戏)a children's game in which players bounce a small ball and pick up small metal objects, also called jacks , before catching the ball  | 
6.  | [u] 丝毫,根本,一点儿(不)anything or nothing at all  | 
You don't know jack. 你什么都不知道。  | 
IDM
a jack of all trades
博而不精的人;万金油;三脚猫a person who can do many different types of work, but who perhaps does not do them very well