"集中注意力"的英语说法是 "to focus one's attention"。这个说法来源于英语中的 "focus" 这个单词，它有 "注意力集中"、"聚焦" 等意思。例句如下：

I need to focus my attention on this problem if I want to solve it.

If you want to succeed in this task, you need to focus your attention on it.

She was able to focus her attention on the game and block out all distractions.