be at a loss

基本解释

We never seemed to be at a loss for things that we enjoyed doing together.
好像從來沒有什麽事我們不喜歡一起做的。
Employees in DC schemes can be at a loss when deciding how much to invest, where to put their money and what kind of pension to expect.
在DC計劃中，雇員在決定投入多少額度以及需要哪種養老金時茫然不知。
Some days in the course of our lessons he would suddenly be at a loss for some word and look vacant and ashamed.
有幾天在上課期間，他忽然一下子記不起一些字句，茫然地露出愧色。

And if you were suddenly stripped of your ability to make generalizations, you'd be at a loss.
如果你突然失去了,歸納的能力，你就會一頭無緒。
耶魯公開課 - 心理學導論課程節選
It comes from personal experience that raises a question at least about whether all values can be translated without loss into utilitarian terms.
是親身見聞所引起的疑問,是否所有的價值都可以完好無損地,轉換爲功利主義的形式。
耶魯公開課 - 公正課程節選
The abandonment of such a study or its adulteration for current political purposes would be a terrible loss for all of humanity, and at the base, at the root of that civilization stood the Greeks.
如果出於政治的目的而對此段歷史,眡而不見甚至完全摒棄,這對全人類,將是一個巨大的損失,追根溯源,這一切都根植於希臘文明
耶魯公開課 - 古希臘歷史簡介課程節選

If these guys weren't building high performance networks we'd be at a loss.
FORBES: Consortium Builds Next-Generation Net