He now worked hard to secure his supreme authority in the Roman state.

自那开始他尽力稳固自己在罗马的最高统治权，

This claim of supreme authority for the Pope is the distinguishing characteristic of Roman Catholicism.

宣扬教皇的至高无上的权威是罗马天主教的明显特征。

Arrogating to themselves supreme authority, they required everyone, without a question, to acknowledge their claims.

他们僭取至尊的威权，要人人无条件地承认他们的主张。