| 单词 | twenty-twenty |
| 释义 | twenty-twenty /twen"tee twen"tee, twun"tee twun"tee/, adj. 1. Ophthalm. having normal visual acuity. 2. keenly or acutely perceptive: an opinion based on twenty-twenty hindsight. Also, 20-20. [1935-40] |
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