名词
中文翻译：通配符
同义词：
['wildcard character', 'wildcard symbol', 'wildcard identifier']
例句：
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1. In thegame of poker, a wildcard is an ace or a face card that can be used to replace any other card in the deck.
在扑克游戏中，一张万能牌是一张王牌或一张面值的牌，可以用来代替任何其他牌。
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2. The company's policy on hiring is based on a wildcard system where employees are evaluated based on their performance ratherthan their qualifications.
该公司的招聘政策是基于一种万能制，员工的评价基于他们的工作表现而不是他们的资格。
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3.The wildcard symbol is often used in mathematics and statistics to represent a variable that can take on any value.
万能符号在数学和统计学中常用来表示一个可以取任何值的变量。