In English, "集中精力" can be translated as "focus" or "concentrate". This comes from the Latin word "concentrare", which means "to bring together". Here are some examples:

I need to focus on my work if I want to finish this project on time. (我需要集中精力在我的工作上，如果我想按时完成这个项目。)

She concentrated all her energy on studying for the exam. (她集中精力在复习考试。)

He was able to focus his mind and solve the difficult problem. (他能够集中精力解决困难问题。)