1、It is easy to drive using the Interstate highway system.
2、走进茅屋，里面显得昏暗和*凉。 这是一个贫穷的家，很穷，很苦，典型的家徒四壁。 老旧的床榻，破烂的桌椅，一些有用或没用的陶罐，一口边上有裂缝的铁锅，一个没了盖子的陶锅，还有两双发黑的筷子…… 这些便是所有的家当。
3、Or you can buy a few maps that show the Interstate highway system,
4、President Obama’s vision for high-speed rail mirrors that of President Eisenhower, the father of the U.S. Interstate highway system, which revolutionized the way Americans traveled.
