例句與造句

1. He enrolled for his doctoral studies at the University of Warwick where he acquired his PhD in Mathematics in 1972; writing his dissertation under the supervision of Professor Luke Hodgkin in the area of algebraic topology under the topic : " Mod-2 K-Theory of the Second Iterated Loop Space on a Sphere ."
2. It's difficult to find iterated loop space in a sentence. 用iterated loop space造句挺難的