1. When his father refused to let him own way, the child played his trump card by crying. 看到爸爸没有如自己的意，那孩子便使出绝招，哇的一声哭了起来。
2. This company has a trump card in the negotiations since it controls most of the stocks. 由于这间公司控制了大部分的股份权，因此在谈判中拥有皇牌。
3. Therefore to establish a powerful navy, especially a submarine fleet as a "trump card", has become the top priority. 因此，组建一支强大的海军，尤其是发展具有“撒手锏”功能的潜艇部队，已成为当务之急。
英英解释
n.
1. a playing card in the suit that has been declared trumps
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