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focus - definition of focus by The Free Dictionary
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日期:2024-09-26
fo·cus (f k s) n. pl. fo·cus·es or fo·ci (-s, -k) 1. a. A point at which rays of light or other radiation converge or from which they appear to diverge, as after refraction or reflection in an optical system: the focus of a lens. Also called focal point. ...看更多