Tourism is the country's top earner of foreign currency.

旅游业是该国外汇创收最多的行业。

More people favour a single European currency than oppose it.

赞成单一欧洲货币的人占多数。

...Western currencies.

西方货币

His theory of the social contract had wide currency in America.

他的社会契约论在美国广为认可。

'Loop' is one of those computer words that has gained currency in society.

有一些计算机术语成了社会上的通用词汇,“循环”就是其中一个。