I felt rather at a loose end after Poirot had left me.

波洛离开我后， 我感到很无所事事。

I was at a loose end so I decided to go see an old movie.

【loose，looseness】我闲来无事，便决定去看一部老电影。

I'm kind of at a loose end, is there anything you need me to do?

我正好闲着没事 有什么需要帮忙的吗？

In 2011, having built up and sold a manufacturing company, he found himself at a loose end.

2011年，在建立并出售了一家制造公司后，他发现自己陷入了困境。