跟读练习: PTE Retell lecture test 1 - 通过视频学习英语口语
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In today's lecture I'm going to talk about changes in air pollution since the middle of the last century
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and what has created these changes.
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So by the 1950s air pollution was very visible with frequent
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thick black fogs known as smogs in many large cities around the world.
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The main source of this pollution was from factories and it caused severe health problems.
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For example, a particularly severe smog in London in 1952 caused over 4,000 deaths.
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Obviously, something had to be done.
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And in 1956, a Clean Air Act was introduced in Britain.
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This addressed the pollution from factories and the smog soon disappeared.
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However, as you know, these days air pollution is still a big issue.
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The main difference between now and the 1950s is that you can't see it, it's invisible.
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Also, the main source of pollution now is from cars and lorries, and although these don't produce visible signs, this air pollution is still a significant risk to health.
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And one of the key factors in the rise of this type of pollution is
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that we have all become much more vehicle dependent.
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There are far more cars and lorries, trains and planes than in the 1950s, and this is now the main source of air pollution around the world.
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关于本课
您正在使用跟读技巧通过视频"PTE Retell lecture test 1"练习英语口语和发音。
每天练习15到30分钟，将显著提高您的英语流利度和发音准确度。
什么是跟读法？
跟读法 (Shadowing) 是一种有科学依据的语言学习技巧，最初开发用于专业口译员的培训，并由多语言者Alexander Arguelles博士普及。这个方法简单而强大：您在听英语母语原声的同时立即大声重复——就像是一个延迟1-2秒紧跟说话者的影子。与被动听力或语法练习不同，跟读法强迫您的大脑和口腔肌肉同时处理并模仿真实的讲话模式。研究表明它能显着提高发音准确性，语调，节奏，连读，听力理解和口语流利度——使其成为雅思口语备考和真实英语交流最有效的方法之一。