If only I had applied myself to studying English in my high school.

要是我在高中时专心致志地学习英语就好了。

youdao

I applied myself to his new job.

我努力干好新的工作。

youdao

Then I applied myself to the understanding of wisdom, and also of madness and folly, but I learned that this, too, is a chasing after the wind.

我又专心察明智慧，狂妄和愚昧，乃知这也是捕风。

youdao

I've also programmed on the C64, and taught myself a lot of things from it that have applied to modern computer classes that I am taking at Cleveland State University.

CNN: What can you do with a Commodore 64?