1. leave sb alone：不理會某人，不管某人，不打攪
e.g. The principal is busy at his desk. You'd better leave him alone.
校長正忙于桌上的工作，你最好別打擾他。
e.g. Leave him alone and he' ll soon come round.
不要理他，他的氣很快就會消的。

2. be aware of

（1）意識到，感覺到
e.g. As I waited, I became aware of something happening in the house.
我在等待的時候, 感覺到房子里發生了什么事。
e.g. He doesn' t seem to be aware of the coldness of their attitude towards his appeal.
他好象沒有意識到大家對他呼吁態度冷淡。
（2）知道，懂得，明白
e.g. He cannot be aware of the soliloquies of others.
他不可能知道別人的獨白。
e.g. You should therefore be aware of some of the traffic laws.
因此，你該知道一些交通規則。