Jacki雅基jackn.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Jn.水手；侍者jackknife clam meat马刀肉jackknife estimator刀切估计量jack-screw system插拔螺杆装置jack-in-a-boxn.打开盒子即跳出一个奇异小人的玩具盒jack and pinion rack千斤顶jack up one's shortsjacking counterforce顶管反力Jack Russell terrier杰克拉塞尔狸jackknife statistics截割统计量jack used to hunt.杰克过去常打猎(但现在不打了)