unaware
/ˌʌnəˈweə(r); ˌʌnə`wɛr/ adj[pred 作表语]
~ (of sth/that...) ignorant or not conscious of sth 不知道; 未觉察
be socially, politically, etc unaware 对社会、 政治等问题不了解
He was unaware of my presence/that I was present. 他不知道我在场.
(fml 文) I am not unaware of the problem. 我并非不了解这一问题.