They don't really know how much the work will cost. They're just taking a stab in the dark.他们并不真的知道这项工作要花费多少。他们只是在瞎估计而已。It was only a stab in the dark, but I hoped I could learn something.虽然那只是在瞎弄，但我还是希望能学会点儿东西。It's a stab in the dark, but we should try anyway.这是盲目的尝试，但我们还是应该试一试。