外汇一国特有的外国货币及以外币表示的可用以进行国际结算的支付手段。包括以外币表示的信用工具和有价证券，如银行存款、商业汇票、银行支票、外国政府国库券和长短期债券，以及其他可以取得外国货币和债权等。一国对外汇的供求，通常主要来自进出口贸易，出口可以获得外汇 The foreign currency unique to a country’s foreign currency and the means of payment in foreign currency that can be used for international settlement. Including credit instruments and securities in foreign currencies such as bank deposits, commercial bills of exchange, bank checks, foreign government treasury bills and long and short-term bonds, as well as other foreign currency and debt claims. A country’s foreign exchange supply and demand are usually mainly from the import and export trade, exports can get foreign exchange