train track maps造句

例句与造句

1. A train track map which is a topological representative of " ? " is called a " train track representative " of " ? ".
2. A 1992 paper of Bestvina and Handel introduced the notion of a train track map for representing elements of isoperimetric inequality; a proof of algorithmic solvability of the conjugacy problem for free-by-cyclic groups; and others.
3. It's difficult to find train track maps in a sentence. 用train track maps造句挺难的