我觉得两种说法

举个例子，The United Kingdom was in its most glorious time in the 19th century, for it was the largest colonial power around the world.

19世纪是英国最为辉煌的时期，因为它是世界上最大的殖民霸权。

所以，同理，你要说依然辉煌，就可以说 be still in glory 或者 be still in its glorious time 这里glory 理解为荣耀或者辉煌

希望能帮到你~~~