底牌 dǐpái

1. dǐpái noun cards in one's hand
   Domain: Modern Chinese 现代汉语
   Notes: (CC-CEDICT '底牌'; Guoyu '底牌' 1)
2. dǐpái noun undisclosed strength or information; hidden trump
   Domain: Modern Chinese 现代汉语
   Notes: (CC-CEDICT '底牌'; Guoyu '底牌' 2)

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亮底牌