n.千斤顶；插座；船首旗；男人；公畜
vt.用千斤顶顶起；抬高
n.杰克（男子名）
n.扑克牌里的J
n.水手；侍者
They put the car up with a hoisting jack. 他们用千斤顶把车抬高。
Jack up the car so you can change the tire. 用千斤顶把车支撑起来，这样你就能够换轮胎了。
Insert this one into the jack carefully. 把这个接到插座上，要当心。
Besides the traditional mophead, there are also roller one and connector jack one. 除了传统的拖把头，还有滚筒式和插座式拖把头。
The man tries hard to jack the car,but to no avail. 那个男人努力想把汽车顶起来，但他的努力却是徒劳的。
After the way Jack treated her,she wouldn't look at another man. 在杰克那样对待她以后，她就不愿再和任何男人打交道了。
The fire cracker went off and scared Jack's dog. 爆竹爆炸声把杰克的狗吓了一跳。
The waiter brought me the ale in a black jack. 侍者用大酒杯盛着啤酒给我端了过来。
Jack worked his way through college by waiting tables. 杰克在餐馆当侍者，半工半读地念完了大学。
用作及物动词 (vt.)We jack the automobile in order to change a tire. 我们用千斤顶把汽车托起换个轮胎。
The man tries hard to jack the car,but to no avail. 那个男人努力想把汽车顶起来，但他的努力却是徒劳的。
Maybe they are going to jack up the price of oil. 他们可能会抬高石油价格。
n.拦路抢劫者；劫持犯
劫机者
