Ignoro, 用英语:

He was unaware of the situation.

The main reason is that the subjects were totally unaware of the possibility of shortcuts.

He seems to be unaware of his mistake.

Do you suppose any woman in the world was ever taken unawares?

I was quite unaware of the problem.

Some were unaware of what had taken place during the night.

I was unaware of the fact that you had gone out.

His mother was unaware of the law.

However, the survivors are unaware of that fact.

People often laud Christopher Columbus for all the lands that he discovered, but most are completely unaware of his numerous under-the-sea discoveries.

There is one important fact of which you are unaware.

He was unaware of the enormity of the offense.