在PTE中,无论是Summarise Spoken Text 还是 Re-tell Lecture的考题大都是从真实的讲座或者演讲中截取的,中间经常经常夹杂很多不同的环境音.很多同学都反映有时未必是听不懂,而是听不到. 鉴于此,墨尔本文波雅思PTE专门为大家总结了真实讲座的PTE练习音频,相比新闻音频来说,整体更加接近PTE考试的真题,内容方面,我们也会为大家提供考试中存在的近似题,最近我们会持续更新,敬请期待!
Exactly forty years ago in 1975, I discovered the greenhouse effect of chlorofluorocarbons or CFCs. These pollutants were used those days as refrigerants and as propellants in spray cans. Till then, scientists thought that carbon dioxide from fossil fuel was the one man-made greenhouse gas. My work showed these CFCs were more than 10,000 times potent than carbon dioxide. I made the prediction in 1980 that the greenhouse effect of man-made pollutants should be detectable by the year 2000. And the planet started warming significantly past 2000, so the prediction was confirmed. So come 2010 the warming would take off and reach values which we have not seen in the last few million years. Can we do anything to stop this warming and bend the curve twenty years from now? And stop the warming reaching catastrophic climate levels. Fortunately we can. We have the science and we have the technology. This is where the initiatives taken in California could shine a brightest light possible on this problem. The Carbon Neutrality Initiative of University of California, through which we would go to nearly zero emissions another ten years and then combine that with the state of California’s aggressive actions to mitigate climate change by using solar, fuel cells and waste gas can provide, like a beacon, for the nation and for the planet, to follow.