Seem as if we can palpability, but unable to find out.

我们似乎明了，却又不得而知。

youdao

I was unable to find out the name of the man who called.

我想不出那个打电话来的人的名字。

youdao

I was unable to find out the name of the man who called.

我想不出谁人打电话来的人的名字。

youdao

That means authorities are often unable to find out how criminals got their guns.

CNN: Why new laws could miss America's bigger gun problem

She was informed by a customer relations executive that her account had been closed, all open orders had been cancelled and all her content had been removed, but has been unable to find out why.

FORBES: But Why Would Amazon Wipe Your Kindle? To Protect Amazon

Many of the men ended up trapped in a canyon, unable to find their way out before the flames engulfed them.

NPR: Wildfire Ravages Los Angeles Park