hard currency
noun /ˌhɑːd ˈkʌrənsi/
  /ˌhɑːrd ˈkɜːrənsi/
 [uncountable, countable]- money that is easy to exchange for money from another country, because it is not likely to lose its value硬通货(币值稳定,容易兑换) - The hotel insisted that we pay in hard currency.酒店坚持要我们用硬通货支付。 
- Trade was halted because of a hard currency shortage on the island.由于岛上硬通货短缺,贸易中断了。 
 
- The hotel insisted that we pay in hard currency.