How do you understand this sentence?

来源: 于 2012-09-11 17:58:15 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

The 1st sentence in the 2nd last paragraph of chapter one of the Great Gat*****y:

 

"Already it was deep summer on roadhouse roofs and in front of wayside garages..."