在对方不知情的情况下模仿对方的动作。

Imitate their partners' gestures without their knowing it.

youdao

其他鸟类在不知情的情况下携带着种子，让种子搭便车。

Other birds unknowingly carry seeds that cling to them for the ride.

youdao

如果这种病毒能够通过空气传播，或者如果一名感染者在不知情的情况下进入了人口密集的地区，那么埃博拉可能已经成为一种全球流行病。

If the virus had been capable of spreading through the air, or if one infected person had unknowingly entered a large population center, Ebola might have become a worldwide epidemic.

youdao

So even without there being an Attorney General, somebody might be awake in the justice department and notice that that's actually illegal.

就算是司法部长不知情,司法部门也会有人会发现,这样的协议是违法的

耶鲁公开课 - 博弈论课程节选

I think that having a forced voter turnout would only force an uninformed vote.

我认为，强制选民投票的结果是不知情的投票。

对于义务投票制 - SpeakingMax英语口语达人

- After all, if you knew-- suppose we had the birthmarks that told you -- when you were going to die-- if you had that kind of a birthmark, you would face your entire life with the burden of knowing, I've got 48 years left, 47 years left, 50 years left.

毕竟，如果你知道-,假设我们有个胎记能告诉你,你什么时候去世-,如果你有那种胎记，你一辈子都将面对那种知情的压力，我还剩48年，还剩47年，还剩50年。

耶鲁公开课 - 死亡课程节选