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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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更新时间:2026/6/4 13:00:09