jack n 1 (usu portable) device for raising heavy weights off the ground, esp one for raising the axle of a motor vehicle so that a wheel may be changed （通常指便攜式）起重器, 千斤頂（尤指更換機動車車輪時用的）. 2 ship's flag flown to show nationality 船上表示國籍的旗子 the Union Jack, ie the flag of the United Kingdom 英國國旗. 3 Jack familiar form of the name John 杰克（約翰的昵稱）. 4 (also knave) (in a pack of playing-cards) card between the ten and the queen （紙牌中的）杰克, J（介於王后與十點之間） the jack of clubs 梅花J. 5 (in the game of bowls) small white ball towards which bowls are rolled （滾球戲中）作靶子的?quot;濁? 6 (idm 習語) before you can/could say Jack Robinson => say. every man jack => man. a jack of `all trades person who can do many different kinds of work but not necessarily well 博而不精的人. jack v (phr v) jack sth in (sl 俚) leavesth readily; abandon (work, etc) 打算離開; 放棄（工作等） I can't concentrate any more. I'm going to jack it in. 我再也無法集中精神了. 我不打算干了. jack sth up (a) raise sth using a jack1(1) 用千斤頂頂起某物 to jack up a car 用千斤頂把汽車頂起. (b) (fig infml 比喻, 口) increase (salary, payment, etc); raise 增加（薪金, 報酬等）; 提高 It's time you jacked up my allowance. 您該給我增加點兒零用錢了. (c) (infml 口) arrange or organize sth that is in disorder 把凌亂的事物安排好或料理好 Everything's falling apart; the whole system needs jacking up. 一切都亂了, 整個系統有待整頓.

①插孔、插座 ②千斤頂,起重器