oblivious

We called out to them, but they remained oblivious. [=they did not notice us]我们向他们大喊，但他们还是没有注意到我们。

He was completely oblivious of [=unaware of] the fact that he'd offended them.他完全没有意识到自己已经冒犯了他们。

She kept dancing, oblivious to everyone around her.她一直在跳舞，对于她周围的人毫无察觉。