I would like to ask a question about 'close in on'

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sykang97

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Hello, teachers.
I would like to ask a question about 'close in on'.
Does it mean 'come closer' in this sentence below?
Does it sound fine?

Thank you in advance ^^ :-D

Following decades of painstaking research, scientists at the Institute of Pharmacology believe they are closing in on an important medical breakthrough.
 

MikeNewYork

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Yes, coming closer to.
 
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