He crawled to peer over the edge of the abyss.他爬向深渊边缘凝神向下看。

He felt he was on the edge of an abyss; one false move and he was finished.他觉得自己在深渊的边缘, 一步不慎就会完蛋。

How big is the abyss between what you think you are and what you actually are?你所认为的自己与真实的自己之间差距有多大呢？

The country was on the brink of an abyss.国家处在深渊的边缘。