You only need to concentrate.
Don't look out the window. Concentrate on your work.
You should concentrate on one thing and learn to do it well.
Settle down for a while and concentrate.
A good ballboy or ballgirl must be able to concentrate hard and run fast.
If you concentrate all your energies on the study of English, you will master the language.
Why did you wake me up to tell me something that big? Now, I'll never be able to concentrate on my work!
Rejecting the urging of his physician father to study medicine, Hawking chose instead to concentrate on mathematics and physics.
It's good to be able to concentrate single-mindedly on your work, but you're completely ignoring the people around you.
The average man fails not because he lacks ability, but because he lacks ability to concentrate.
Does it take a lot of effort to concentrate if
I find it hard to concentrate after a big meal.
Sometimes it's difficult for me to concentrate at work on Friday afternoons.
At this moment in time, we cannot concentrate on one of these two issues alone.
The municipal council should concentrate more on specific issues.