We thought the project would be simple, but it turned out to be a real can of worms.我们原以为那个项目很简单，后来却发现很棘手。

Our boss is reluctant to change the policy now because she doesn't want to open a can of worms.我们老板现在不愿意改变政策，因为她不想惹上一堆麻烦。