实际上，新法律收效甚微。

___In ___practice, the new laws have had little effect.

当你离开学校时，你拥有知识，但却不知道如何在实践中运用它。

When you leave school, you have knowledge but you do not know how to use it ___in ___practice.

这个策略在纸面上看起来很完美，但在实践中却完全失败了。

The strategy looked perfect on paper, but ___in ___practice it failed completely.