He went through concentration camps and got out alive and wrote this book.

他经历了集中营并活着出来并写了这本书。

In addition, running and swimming are also very popular sports for young people to improve their concentration through exercise.

此外，跑步和游泳也是非常受年轻人欢迎的运动项目， 可以通过锻炼提高专注力。