例句與造句

1. I'm looking at ways of composing ( circle ) inversions to obtain Mobius maps : I've been able to show that hyperbolic, parabolic and elliptic transformations can all be written as the product of 2 inversions, but I'm having trouble showing that a loxodromic map can be written as the product of 4 inversions ( it's not possible as 2 )-could anyone explain how to produce a loxodromic map via 4 inversions?
2. It's difficult to find elliptic transformation in a sentence. 用elliptic transformation造句挺難的