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,墨尔本悉尼文波雅思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!
Well. We often speak about the Higgs as the field that gives the rise to mass for all other particles and there is a truth to that is indeed what it does. But it doesn’t mean that if I am holding a bowling ball, that the mass of the bowling ball is coming purely from the Higgs field, that’s actually not right. See the bowling ball is made up of atoms, inside the atoms you have the nuclei, neutrons and protons, that’s where the bulk of the mass of the bowling ball comes from. Now the neutrons and protons are made up of quarks, the quarks have mass because of the Higgs field, but if you were to add up the mass of all individual quarks inside a proton, three of them. It would not add up to the mass of the proton, you see, where is the other mass coming from. It’s coming from the factor that the corks are all pulling on each other with this strong nuclear force. There is glue, gluons that are being interchanged between the quarks, and it’s the energy of the glue, energy of the gluons that contributes to the bulk of the mass of the proton from equals mc-squared squared, so if you looked at the mass of the bowling ball, it’s largely coming from the energy of the gluons, that holding the quarks together, holding the protons and neutrons together inside the atoms.
