From 2005 to 2010. He was in a class by himself.

2005至2010年。他以前可是有专人指导的呢。

In several regions, especially in the Mississippi Valley, a farmer who has no telephone is in a class by himself, like one who has no mowing-machine.

在一些地区，尤其是在密西西比河谷，一个没有电话的农民独自上课，就像一个没有割草机的农民一样。