✔ 最佳答案
He conquered much of what was then the civilized world, driven by his divine ambition of the world conquest and the creation of a universal world monarchy.
受著征服世界及創立一個統一世界的帝國的神聖野心所驅使,他征服了大部分當時的文明世界。
then = 當時
what was then the civilized world = 當時的文明世界