cross·ruff /ˈkrɔsˌrʌf, ˈrʌf/
  同一方的人互相出王牌
  Cross·ruff n. Whist The play in bridge or whist where partners trump each a different suit, and lead to each other for that purpose; -- called also seesaw.
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  crossruff
       v : trump alternately in two hands