例句與造句

1. A discrete symmetry group is a symmetry group that is a discrete isometry group.
2. This includes all discrete isometry groups and also those involved in continuous symmetries, but excludes for example in 1D the group of translations by a rational number.
3. A discrete isometry group is an isometry group such that for every point of the metric space the set of images of the point under the isometries is a discrete set.
4. :For every discrete isometry group in two-and three-dimensional space which includes translations spanning the whole space, all isometries of finite order are of order 1, 2, 3, 4 or 6.
5. The result in the table above implies that for every discrete isometry group in four-and five-dimensional space which includes translations spanning the whole space, all isometries of finite order are of order 1, 2, 3, 4, 5, 6, 8, 10, or 12.
6. It's difficult to find discrete isometry group in a sentence. 用discrete isometry group造句挺難的
7. If, in the case of a discrete isometry group containing a translation, we apply this for a translation of minimum length, then, considering the vector difference of translations in two adjacent directions, it follows that " n " d " 6, and for odd " n " that 2 " n " d " 6, hence " n " = 1, 2, 3, 4, or 6 ( the crystallographic restriction theorem ).