在中文中，可以用"付出了许多精力"来表示花费了很多努力或者心血。这个短语通常用来描述一个人为了实现某个目标或者解决某个问题而不懈地努力。

在英文中，可以用"put in a lot of effort"来表示同样的意思。例如：

I put in a lot of effort studying for the exam, but I still didn't do well. (我花了很多努力复习考试，但是我还是没有取得好成绩。)
She put in a lot of effort to learn how to play the piano. (她花了很多精力学习如何弹钢琴。)
He put in a lot of effort to improve his Engpsh, and it paid off. (他花了很多努力提高英语水平，结果得到了回报。)

此外，在英文中还可以用"put in a lot of work"来表示花费了很多努力，例如：

We put in a lot of work on this project, and it's finally starting to pay off. (我们在这个项目上花费了很多努力，结果终于开始有所回报了。)
She put in a lot of work to get her degree, and it was worth it. (她花费了很多努力获得学位，这是值得的。)