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!
We don’t have any meteorites from Mercury, Mercury is too close to the Sun. Any meteorite like that flow off of Mercury will not come back out to the Earth. It would probably go into the sun instead. So we don’t think we have any meteorites in Mercury. But we can do the same sort of thing, so this is the messenger machine that orbited Mercury and based on their data, they were able to determine that there is a solid iron core from Mercury, a Molten core with iron sulfur and silicon and then this Fes layer. Now you’ll notice that Mercury is mostly core. Why is Mercury mostly core VS the earth which is core pluses this huge mantle. If you think about to those giant impacts that I’ve showed you for the earth for example, it’s thought there was a giant impact that hit Mercury so hard that its mantle got stripped off of it and just flew into the sun. And so the only thing that ‘s basically left is this giant core of a planet.