to fix all your attention on the person or thing mentioned 集中全部注意力于
They zeroed in on the key issues.
他们集中讨论了关键问题。
My teacher helped me zero in on my problems with algebra.
老师帮助我集中精力解决代数上的一些问题。
Scientists are hoping to zero in on a cure.
科学家们希望集中精力研究一种治疗方法。