| 单词 | twenty-twenty |
| 释义 | > as lemmastwenty-twenty twenty-twenty n. (also 20/20) Ophthalmology the Snellen fraction for normal visual acuity, expressed in feet; colloquially used to denote good eyesight; also figurative. ΘΚΠ the world > physical sensation > sight and vision > types of vision > [adjective] > normal or correct orthoscopic1853 twenty-twenty1875 orthoptic1886 orthophoric1888 the mind > goodness and badness > quality of being good > perfection > [adjective] > perfect finea1300 perfecta1398 crownedc1405 absolute?a1425 obsolute1522 quintessential1551 absolentc1560 fashionate1593 omniperfect1678 quadriform1679 exemplary1709 perfick1771 puffick1858 twenty-twenty1875 copybook1908 perfecto1941 1875 T. Longmore Man. Instructions Army testing Vision (ed. 2) iii. 46 The 20-feet types are read at 20 feet, the 30-feet types at 30 feet; then V. = 20/20 or 30/30, and the acuteness of vision is normal. 1945 L. Shelly Hepcats Jive Talk Dict. 35 Twenty twenty, excellent. 1951 E. F. Tait Textbk. Refraction ii. 16 The visual acuity of healthy corrected eyes may be much better or considerably worse than that represented by the 6/6 or 20/20 standard. 1956 ‘E. McBain’ Cop Hater (1958) iii. 21 Having 20/20 vision without glasses..he..had been appointed a patrolman. 1962 Flight Internat. 81 426/2 Perfect eyesight is denoted as 20/20 vision, and the newest expression in the US air transport business—ruefully coined, we believe, by somebody in Convair—is 20/20 hindsight. Hindsight, of the 20/20 kind, abounds in plenty. But the aviation business is more interested in 20/20 foresight, because it can prevent people from losing a lot of money. 1977 H. Greene FSO-1 ix. 83 We're looking back with twenty-twenty hindsight, now. 1981 P. Turnbull Deep & Crisp & Even ix. 162 He had 20:20 vision... He glimpsed a black shape. < as lemmas |
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