be unaware of the truth;be kept in the dark;ignorant of the facts [truth];(The case) is still enveloped [wrapped] in mystery. ;

Mostly demonstrate for the function of MIJI, and the other of unknown purposes.
主要用于示范本网站功能, 以及其他不明真相的用途.
来源:互联网摘选He'd taken a body of observable fact that was unaccounted for, and accounted for it.
他一生致力于对不明真相的解释.
来源:互联网摘选
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