unipolar world的意思|示意

The second is that America's role as the single pole of a unipolar world is inevitably coming to an end.

第二种变化在于，美国所扮演的单极世界中唯一一极的角色正在不可避免地走向终结。

Both ultimately triumphed in their epic struggles and found themselves the lone superpower in a unipolar world.

它们都最终在史诗般的斗争中取得了胜利，并且于此发现它们已处于世界唯一超级大国的地位。