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What does "zero in on..."mean? Argue with sb?
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Wenrouhu"zero in on..."

It would depend on the context in which the phrase is used. If, for example, you said, 'I will have to zero in on...', you could also say, 'I will have to direct all of my attention to...'.

Hope that helps.

Take care,

HotWombat
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focus on ....
Phrasal Verb

zero in

1.

a. To aim or concentrate firepower on an exact target location.

b. To adjust the aim or sight of by repeated firings.

2. To converge intently; close in: The children zeroed in on the display of toys in the store window.

Source: http://www.answers.com/topic/zero