aware和conscious的用法区别

　　I don't think people are really aware of just how much it costs.

　　我认为人们并不真正明白这要花多少钱。

　　We are very much aware of the lack of food supplies.

　　我们完全了解食物供应的缺乏。

　　He became acutely conscious of having failed his parents.

　　他深深感到自己辜负了父母的期望。