我集中关注了规划问题。

I have concentrated on programmatic issues.

youdao

我集中精神的时候不会皱眉头。

I don't frown when I do that.

youdao

我集中不了注意力。

I'm incapable of concentration.

youdao

I'm going to say, quite to the contrary, the positive charge is concentrated at the center in a tiny, tiny, tiny volume.

我要说的是，完全相反，正电荷集中在中心,在一个非常非常小的体积内。

麻省理工公开课 - 固态化学导论课程节选

Because I feel like if, if I sit in front of the computer screen for too long, I just get distracted

因为如果我坐在电脑屏幕前太长时间，就会注意力不集中的，

关于学校生活 - SpeakingMax英语口语达人

We can never just have it there before us or, as I say, if we can--if we can--it's a very, very difficult act of concentration.

我们永远不能只面对着它，或者，要我来说，如果我们可以的话，那将需要高度集中注意力，这是很难的。

耶鲁公开课 - 文学理论导论课程节选