of…，unaware that… not realize …没意识到，没察觉到
Now more and more people are aware of the importance of environmental protection.
现在越来越多的人认识到环境保护的重要性。
From the expression on the doctor's face，she was aware that her son’s illness was very serious.
从大夫脸上的表情她意识到她儿子的病很重。
He was unaware that their talk had been overheard.
他没察觉到他们的谈话被偷听了。
2）concerning prep.：in connection with （正式）关于 ，与……有关的
Please inform me concerning the new sales plan.请把关于新销售计划的情况告诉我。
The book deals with questions concerning China's foreign policy.
这本书论及有关中国外交政策的一些问题。
3）sound a startling warning：
sound vt.：发出信号
startling ：very unusual or surprising 令人吃惊的，惊人的，
a startling achievement 不凡的成就
startling results 惊人的结果
startling facts 触目惊心的事实
