编者按：美国各大学对托福成绩要求有逐年增高趋势，这对同学们提出了更高的挑战。在托福考试中会遇到很多长难的句子结构，无忧托福网特整理汇编100句结构和内容都很经典的英文句子献给大家，祝同学们在考T的道路上勇往直前！

　　79. The practice of making excellent films based on rather obscure novels has been going on so long in the United States as to constitute a tradition.

　　79.根据默默无闻的小说制作优秀影片在美国由来已久，已经成为传统。