| 单词 | rule of two and three |
| 释义 | rule of two and three : a bidding principle in contract bridge: a player who makes a preemptive bid should not overbid by more than two tricks when vulnerable or three tricks when not vulnerable |
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英语词典包含469781条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。