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单词 θ198261
释义
society > communication > telecommunication > [noun] > signal > conveying information by its presence or absence (2)
mark1837

Telecommunications. Each of a succession of strokes, dots, etc., on or holes in a paper strip whose relative duration and separation are used to…

space1840

Telecommunications. An interval between consecutive marks in a mark–space signalling system such as telegraphy. Opposed to mark, n.1 19b.

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更新时间:2024/12/24 4:22:13