A deluge flood.

洪水；泛滥。

A violent or sudden change of the earth's surface, as from an earthquake.

(地球表面)急遽的变化(如地震遗迹)；灾变。

Hence, an upheaval, social or political, such as a great war.

(社会或政治上之)剧变(如大战爆发)。