zero-in

An enemy battery zeroed in on the crossroad.

敌人炮兵集中炮火于那个字路口。

The figure 100 has two zeros in it.

数字100有两个零。

They zeroed in on the key issues for discussion.

他把注意力集中到讨论的关键问题上来。

In the summer of 2003 we began to zero in on one microfossil type whose complex morphological characteristics particularly intrigued us.

2003年夏天，开始瞄准一种微化石的类型，其复杂的形态特徵特别引兴趣。