“顽固地”用英语怎么说？

该国顽固地拒绝为其过去的战争罪行赔罪.This country refuses stubbornly to make amends for its past war crimes.她顽固地拒绝合作.She stubbornly refused to cooperate.失业数字仍然顽固地居高不下.Unemployment figures are remaining obstinately high....