zero in

Từ điển WordNet v3.1 - WordNet Dictionary

verb

1. direct onto a point or target, especially by automatic navigational aids (Freq. 1)
• Syn:
range in, home in
• Hypernyms:
target, aim, place, direct, point
• Verb Frames:
- Somebody ----s PP
2. adjust (as by firing under test conditions) the zero of (a gun)
- He zeroed in his rifle at 200 yards
• Syn:
zero
• Hypernyms:
adjust, set, correct
• Verb Frames:
- Somebody ----s something