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1=/()23:=*=*=/=/456=/7:8self-sufficient instrumentpure documentary transactionprimary liabilities for payment9=+(-)()“”“”“”“”1.“” 2.3./sufficient instrumentpure documentary transactionprimary liabilities for 4.5.1.2.3.10=/=()/((+)/2) 11(1)(2)(Bretton Woods system)1944“”1213:npnp(1-p)14:1516:(1) (2) (3)17:()18191100100010000119.05119.0510.97050.9705USDGBP20GBP21RAT() .() () ()(1);(2);(3)()(4);(5)(6)(7);(8)()()()(1);(2);(3);(4);(5);(6);(7); (8)22(capital structure change) (1)(2)( D);