These included Constantinople's choice location, its closeness to trade routes, a more highly urbanized society and most importantly the knack of diverting Barbarian invasions away from them and towards the Western Empire.

例如，君士坦丁堡的地理位置接近东西贸易要道，社会高度城市化，更重要的是，他们能够避开蛮族入侵，并且把蛮族引向入侵西罗马帝国。

The Vandal invasion was the first actual barbarian invasion of the Roman provinces in Africa,   a foundation of the Western Roman Empire and a region that had been untouched for centuries.

汪达尔入侵是野蛮人第一次真正入侵非洲的罗马省份，这是西罗马帝国的基础，也是一个几个世纪以来未受破坏的地区。