[speaker001:] That looks like an interesting book.
[speaker002:] It is. It 's got pictures of interesting building from all over the world, with brief descriptions of how they were build, their purpose, and so on.
[speaker001:] There are the pyramids. It 's easy to see how they got that name! they don 't have smooth sides though.
[speaker002:] They don 't now, but most of them did originally. There 's picture of the pentagon in the united states. It 's very distinctive with its five sides.
[speaker001:] Look at that cylindrical office building. I 'Ve never been seen one that shape before.
[speaker002:] Yes. Usually only TV towers are cylindrical in shape.
[speaker001:] TV towers are usually thicker at the bottom than at the top. They 're not perfectly cylindrical.
[speaker002:] This is the world 's largest sports stadium. It 's a massive oval.
[speaker001:] What sports do they play there?
[speaker002:] It says here that it 's m mainly used for big football matches and athletics meetings.
[speaker001:] Is that building a perfect cube?
[speaker002:] According to the book, it is. I 'Ve never seen a building that is a perfect cube. Look at the building. From the air, it looks like a square with a semi-circle attached to each of its four sides. What
[speaker001:] Is says here that it 's a war memorial. Now, there 's a distinctive structure-the stomium in Brussels. See? It consists of several connected by cylinders. I believe you can go up and down inside it.