The euro remained firm against the dollar, but fell against the yen.

欧元对美元依然坚挺，但对日元的汇率则下跌。

《牛津词典》

They remained firm friends.

他们依然友情甚笃。

《牛津词典》

Their tent, though light as a feather, remained firm.

他们的帐篷虽然像羽毛一样轻，但是很坚固。

youdao

Demand remained firm in May despite declines on a three month moving average basis.

FORBES: Global Business Confidence Falls To 2008 Levels

But here in Mohawk, even the victims' friends said their stance on gun rights remained firm.

WSJ: In Mohawk Shootings, Town Feels Anger at Gov. Andrew Cuomo

Chinese negotiators continued to push for more but Rio remained firm, as have the other producers.

ECONOMIST: Rio Tinto and China