one major opening and response 1 3 trump 5-9p,2M 10-12p,1n,3M 13-15p,3n 16+,4c(swiss bids) 2 4 trump 0-6 ,3M 7-8.3c(Bergen raise) 9-11,3d(Bergen raise) 12+.jacby 2nt Unbalanced hand Concealed splinter 1s-3h!3s relay!3n,4c,4d,c,d,h singleton Or void,respectively 1h-3s,3n relay!回答同上! 4d,5 trump,13-15p 2-over-1 game force 好牌慢叫,差牌进局! opponent interphere 再学 第一次看书!觉得还可以,没多少约定!比当初学精确好一些,以后叫牌可以多点自信了吧!?