Definition (Cambridge Dictionary): knowing that something exists, or having knowledge or experience of a particular thing.（知道的，意识到的，强调感官对外界事物的意识）

Example:

He was aware of his mistake.

他意识到自己的错误。

She was well (= very) aware that he was married.

她很清楚他已结婚了。

Definition (Cambridge Dictionary): to notice that a particular thing or person exists or is present.（有意识的，意识到的，一般指内心所意识到的）

Example:

The salesman is conscious of the fact that he must increase sales.

销售员意识到他必须增加销售量。

He gradually became conscious (of the fact) that everyone else was wearing a suit.

他渐渐意识到别的人都穿着西服。