(a) Ophthalmology a large card printed with rows of letters of decreasing size for use in testing visual acuity (cf. Snellen, n.); (b) Television a…
| 单词 | θ197442 |
| 释义 | society > communication > broadcasting > television > [noun] > specific transmission for adjustment of sets (1) test card1892 (a) Ophthalmology a large card printed with rows of letters of decreasing size for use in testing visual acuity (cf. Snellen, n.); (b) Television a… |
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