adj.未知的；不为人知的
adv.瞒着

The company's financial crisis was unbeknownst to most of its employees.
这家公司的财政危机对大多数员工来说是未知的。
She carried on with her work, completely unbeknownst of the danger lurking nearby.
她继续工作，完全不知道附近潜伏着危险。
The truth about his past was unbeknownst to everyone until the very end.
关于他过去的真相直到最后才为所有人所知。
The thief managed to escape without anyone being unbeknownst of his presence.
小偷设法逃走了，没有人察觉到他的存在。
They were completely unbeknownst of the impact their actions would have on the environment.
他们完全不知道他们的行动对环境的影响。
The secret society operated unbeknownst to the government for years.
这个秘密社团多年来在政府不知情的情况下运作。
The news of her promotion was unbeknownst to her colleagues until the official announcement was made.
她升职的消息在正式宣布之前对她同事们来说是未知的。
He lived his entire life unbeknownst to the fact that he had a twin brother.
他一生都不知道他有一个孪生兄弟。
The true identity of the author remained unbeknownst to the public until after their death.
作者的真实身份直到他们去世后才为公众所知。
The experiment was conducted unbeknownst to the participants, who were told it was a simple survey.
实验是在参与者不知情的情况下进行的，他们被告知这只是一个简单的调查。