感到束手无策英语

I have nothing to do.or I can't help it.

nail-biting

we have no idea 就是等于 we don't know，个人认为不是很贴切。还是we can do nothing 好点

束手无策 [词典] be at a loss what to do; be at the end of one's rope; can do nothing but nailbiting; can do nothing to help...; nail-biting; [例句]他束手无策地站着，活像丢魂失魄似的。He stood helplessly, like a lost soul.