Section_ⅠWelcome to the unit & Reading - Prereading
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The evolution① of video and sound devices②
Early history of TV
The first public TV broadcasts were made in the USA in 1925. Later, in 1928, the first longdistance③ TV broadcast was made between the UK and the USA. Regular public broadcasting followed shortly afterwards④, first beginning on 11 May 1928 in New York and on 20 August 1929 in London⑤.
Many different people contributed to⑥ the development of TV. Most early TV broadcasts were made using a system developed by John Logie Baird⑦ in the UK. However, his system was very primitive⑧ and had many drawbacks⑨. An American, Philo Farnsworth, made important breakthroughs⑩ in the development⑪ of TV in the late 1920s⑫ and early 1930s. Modern TVs use many of the principles⑬ first discovered by Farnsworth.
John Logie Baird constructed⑭ the first colour TV in 1928, but it was not until 1938 that the first colour TV programme was broadcast⑮. It took more than two decades, though, until 1951, for regular colour TV broadcasts to begin in the USA. Regular colour TV broadcasts were delayed⑯ in the UK until 1967. However, within a short time nearly all TV broadcasts were made in colour, and within five years more colour TVs than blackandwhite⑰ TVs were being used. ①evolution/ˌiːvə'luːʃn/ n.演变,发展;进化
with the evolution of 随着......的演变
②device/dI'vaIs/ n.装置,设备
③longdistance是由"形容词+名词"构成的合成形容词,在句中通常作定语,意思是"远距离的;长途的"。
④afterwards adv.以后,后来
⑤现在分词短语beginning on ...作伴随状语。
⑥contribute to贡献,捐献;有助于
make contributions to对......做贡献
⑦现在分词短语using a system developed by ...在句中作方式状语;其中过去分词短语developed by ...作a system的后置定语。
⑧primitive adj.原始的,远古的
⑨drawback/'drɔːbæk/ n.缺点,缺陷;不利条件
⑩make breakthroughs取得突破
⑪development n.开发,研制;发展
⑫in the late 1920s在20世纪20年代末期
⑬principle/'prInsəpl/ n.原理,法则;道德原则,行为准则
⑭construct/kən'strʌkt/ vt.制造;修筑,建造
⑮本句为强调句型,在此强调时间状语not until 1938。
⑯delay/dI'leI/ vt.& vi.(使)推迟,延迟n.延误,延迟
⑰blackandwhite/ˌblækən'waIt/ adj.黑白的