at a loss

I was at a loss for words when I heard the news.(我听到这则消息时，不知道该说些什么好。)

The boy was at a loss when he could not find his mother.(当这个孩子找不到妈妈时，茫然不知所措。)

We are now operating at a loss.(我们现在是亏本经营。)

I was at a loss for what to do next.(我不知道下一步该怎么办。)

Happy beginning than the end. Your love gives me the at a loss.(开始比结束快乐。你的爱让我不知所措。)

It's true, I am at a loss.(我失去方向那时个事实。)

He feels he cannot stop and is at a loss for solutions.(他觉得他停不下来，而且无法解决。)

The police were at a loss to explain the affair?(警察们不知该如何解释这一事情。)

His comments left me at a loss for words.(他的评论让我不知说什么才好。)

Detectives are so far at a loss to explain the reason for his death.(至今侦探仍茫然无法解释他的死因。)