| 单词 | wild card |
| 释义 | wild cardBrE /ˈwaɪld kɑːd/ NAmE /ˈwaɪld kɑːrd/ noun (in card games 纸牌游戏) a card that has no value of its own and takes the value of any card that the player chooses （由持牌人自由决定牌值的）百搭牌，变牌(sport体育) an opportunity for sb to play in a competition when they have not qualified in the usual way ; a player who enters a competition in this way “外卡” 参赛，“外卡” 选手（指没有正常参赛资格而参赛）(computing计算机) a symbol that can represent any letter or number 通配符a person or thing whose behaviour or effect is difficult to predict 难以预测的人（或事物）；未知因素；未知数 |
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