acuity
acuity[əˈkjuːɪti]noun- [mass noun]sharpness or keenness of thought, vision, or hearing
(思想、视力或听力)尖锐,敏锐
intellectual acuity.
智力敏锐。
visual acuity.
视力敏锐。
语源- late Middle English : from Old French acuite or medieval Latin acuitas, from Latin acuere 'sharpen' (see acute)
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