měi / yuán / cháng / qī / yǐ / lái / yì / zhí / shì / shì / jiè / shàng / zuì / zhòng / yào / de / chǔ / bèi / huò / bì / zhī / yī

美元长期以来一直是世界上最重要的储备货币之一。

The US dollar has long been one of the world's most important reserve currencies.