without the person mentioned knowing
Unbeknown to her they had organized a surprise party.
他们瞒着她筹备了一个给她意外惊喜的聚会。
1.〈口〉未知的,不得而知的(to)
1.瞒着
1.happening without a particular person knowing about it
2.not known or familiar to somebody
1.without being noticed or seen by anybody
1.But during this time, unbeknown to the social workers, Jan had come to live in her mother's house, throwing the family into fresh tumult.
然而就在这时，珍妮背着社会福利组织，擅自住在母亲的家里，将整个家庭重新投入新的灾难中。
2.After driving for an hour, passing it twice unbeknown, we finally had to call for directions.
我们开了一个钟头的车，两回穿过同一个陌生地方，最终只得打电话问路。
3.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。
4.Unbeknown to the 24-year-old nursery nurse, from Stanley, County Durham, already a mum to daughter Grace, she was five weeks overdue.
这个来自达拉谟斯坦利的24岁护士，已经有个女儿名叫格瑞丝。而她此次已过了预产期五周，事前却对此一无所知。
5.The reason Qunny joined Axe and Spear is still unbeknown, some people guess it's because he's interested in the treasure of Elysium , too.
而奎尼加入斧与矛的理由仍然未知，有些人猜测可能是他也对净土的无尽财宝有兴趣。
6.We have constantly monitored these situations, and have unbeknown to you ensured that the affects are watered down.
我们已经不断地监控这些情况，并暗中确保不良影响被冲淡。
7.Rome's highest appeals acquitted a 49-year-old man who, unbeknown to his girlfriend, had recorded and kept films of them having sex.
罗马最高上诉宣告一名49岁男子在女友不知情的情况下录下并保留了两人性生活的录影带。
8.Unbeknown to them, the "scrap" contained a highly radioactive source used to treat cancer patients.
他们不知道这件“废品”里有一个用于治疗癌症患者的高辐射源。
9.I mocked myself here that it is rather not Death itself , but the unbeknown future that holds terrors for me .
我也在此自嘲了，让我畏惧的不是死亡，而是未知的未来。
10.And therefore there will be people who from time to time, for reasons unbeknown to us, will choose not to love.
所以我们会遇上一些不知道原因，却选择不去爱的人。