v.（马等）猛然弓背跃起( buck的现在分词 )；抵制；猛然震荡；马等尥起后蹄跳跃 英英释义： buck[ bʌkiŋ ]n.a gymnastic horse without pommels and with one end elongated; used lengthwise for vaulting同义词：vaulting horselong horsea piece of paper money worth one dollar同义词：dollardollar billone dollar bi