【万物简史】PART III CH 11马斯特·马克的夸克（6）_英语听力练习mp3下载-科学-沪江听力酷

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【万物简史】PART III CH 11马斯特·马克的夸克（6）

听力简介：

研究粒子物理学是十分费钱的事业，但是收获颇丰。科学家发现，将微观粒子的世界放大看，便又是一个宇宙系统呈现在我们眼前~~~

❤《万物简史》推出部落节目版，戳这里订阅:http://bulo.yeshj.com/menu/6004/

文中需听写单词或词组用[-No-]表示，句子用[---No---]表示。请边听写边理解文意，这样可以提高听力准确度，并为训练听译打下基础哦~~~

Hints:
Carl Sagan
Cosmos
electron

Since the supercollider debacle particle physicists have set their sights a little lower, but even comparatively modest projects can be quite breathtakingly costly when compared with, well, almost anything. A [-1-] neutrino observatory at the old Homestake Mine in Lead, South Dakota, would cost $500 million to build—this is a mine that is already dug—[-2-] There would also be $281 million of "general conversion costs." A particle accelerator at Fermilab in Illinois, [-3-], cost $260 million merely to refit.

Particle physics, in short, is a hugely expensive enterprise—but it is a productive one. Today the particle count is well over 150, with a further 100 or so suspected, but unfortunately, in the words of Richard Feynman, "it is very difficult to understand the relationships of all these particles, and what nature wants them for, or what the connections are from one to another." [---4---] Some people think there are particles called tachyons, which can travel faster than the speed of light. Others long to find gravitons—the seat of gravity. At what point we reach the irreducible bottom is not easy to say. [---5---] "Within it, organized into the local equivalent of galaxies and smaller structures, are an immense number of other, much tinier elementary particles, [---6---]—an infinite downward regression, universes within universes, endlessly. And upward as well."