He was oblivious of what was happening.

他已经忘却发生什么事了。

For a person who has known them so long you are strangely oblivious to their faults.

个认识他们很久人说，你异乎寻常地没有意识到他们缺点。

She was oblivious to our warnings.

她忘了我们提醒。

At the edge of a sprawling grassland, a pair of hoofed grazers resembling horses, an antelopelike notoungulate and a ground sloth feed quietly, oblivious to their impending doom.

在辽阔草原边缘，有貌似马儿有蹄草食动物、只很像羚羊南方有蹄类和只地獭正在静静觅食，没有注意到大祸即将临头。