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He went there unbeknown to me .

他瞒着我到那里去的。

His past is ancient and unbeknown just like his true power .

他的过去古老而不为人知，就如同他的真实力量一般。

Unbeknown to most who pass through this serene place , however , it is a gold mine for medical research .

然而这个宁静，不为人知的地方是一个用于医学研究的金矿。

But as megan exercised more and , unbeknown to her parents , ate less , her weight began to plummet .

随着梅根练习得越来越频繁，而且瞒着父母吃得更少，她的体重开始暴跌。

A crisis unbeknown to me ; she had been ill for months , unbeknownst to the family .

我所不知道的危机；她病了一个月，没被家人知道。