The euro should constitute an important reserve currency and play a key role in portfolios of financial assets on an international scale.

欧元应该成为重要的储备币种，并在国际金融资产组合中起关键作用。羃。

youdao

It is the world's key currency and the only true international money.

FORBES: No Greenback Crash

Given perestroika's failure, thus far, to boost Soviet economic performance and living standards, there are many indications that Moscow intends to expand the USSR's role in the international economy as a means of resolving at least some of its key economic and hard currency earning problems.

CENTERFORSECURITYPOLICY: Center For Security Policy

China's currency and its trade surplus are expected to be key issues at this week's World Bank and International Monetary Fund annual meeting, in Singapore, which will focus on global imbalances in the world economy.

BBC: NEWS | Business | China trade surplus at new high