oblivious

形容词 oblivious:

1. (followed by `to' or `of') lacking conscious awareness of
   同义词：unmindful
2. failing to keep in mind
   同义词：forgetful

1. Devoid of scruples; oblivious to or contemptuous of what is right or honorable.
   毫无顾忌的全无顾忌的; 忘了何为正确或光荣的或对正确的或光荣的事物轻蔑的
2. The speaker ground on, oblivious of his listeners' boredom.
   演说者唠唠叨叨，没注意到听众的厌烦情绪。
3. I am oblivious to what was happening.
   我对发生的事情没有记忆了。
4. I was oblivious of my surroundings.
   我没有注意到周围的事物。

o.bliv.i.ous

adj.（形容词）
Lacking all memory; forgetful.
健忘的；忘却的
Lacking conscious awareness; unmindful.See Synonyms at forgetful
不知不觉的；不自觉的参见 forgetful

【引伸】
obliv.iously
adv.（副词）
obliv.iousness
n.（名词）
In an earlier surveya majority of the Usage Panel accepted the use of bothof and to with oblivious:
在早期调查中，大多数用法专题使用小组的成员接受of 和 to 与 oblivious的连用：
例句：
The party appeared oblivious to (or of ) the mounting pressures for political reform.
这个政党好象忘记了（或 of ) 政治改革的沉重压力