除了 concentrate 之外，attentive 與 focus 都可以用來表示專心或專注於某事物的意思。
專心英文造句練習If you want to finish this job, you must concentrate on it.
Focus on entrepreneurship is the foundation of success.
Many people can not concentrate on studying in a noisy environment.
I like to watch my child concentrate on thinking or play with toys.
If you concentrate on thinking about one thing, you can always think more about it.
It is impossible to "always be very attentive".
Mike is very attentive to his thesis.
Most people are particularly concentrated on what they are interested in.
I have to concentrate on this project.
If you do not concentrate, your work will not be perfect.