| 摘要 |
<p>The pair of dice are used for choosing lottery numbers and each of them is a regular decahedron with ten faces. The surface of each of the faces is identical and some of the joins between the faces are spherical. One die is used to choose tens and has the numbers 0-4 marked on its faces, each number being on two faces. the other die is for choosing units and has the numbers 0-9 marked on its faces. The numbers on the first die are in a different colour or style to those on the second die.</p> |
