They suddenly became aware of people looking at them.

　　他們突然意識到有些人在瞧著他們。

　　Everybody should be made aware of the risks involved.

　　應(yīng)該讓人人都知道其中的風險。

　　At that time, the general public was/ were not aware of the health risks.

　　那時，公眾對各種危及健康的因素尚不了解。

　　She was aware that she was losing all sense of perspective.

　　她意識到自己正在失掉一切正確判斷的能力。

　　I'm aware of Mark's reputation for being late.

　　我知道馬克遲到是出了名的。