So each belligerent kept its gold supply as a final reserve, to be paid out only when other countries would accept no other means of payment.

所以每个交战国都把它的黄金供应作为最终储备，唯有在其他国家不接受其他支付手段的情况下才用于支付。

youdao

Some charities, including Oxfam, have said they will refuse money from "belligerent countries" during any war in Iraq.

BBC: Aid agencies' race against time

In the 1920s, there was a pseudo-return to gold, in that the formerly belligerent countries wanted the currencies they had overprinted in the war to trade at the pre-1914 parities.

FORBES: Trashing The Gold Standard is Now The Stuff Of Amateurs