We selected two three-grade natural classes from Dongjing Junior Middle School in changsha, divided into the experimental class and the control class.

在长沙市洞井中学选取初三年级两个自然班，分别为实验班与对照班。

youdao

For most of them,everything's rosy. Once dismissed as lowly junior colleges and commuter schools in urban areas where students could walk or take public transit to class, these two-year colleges are attracting tens of thousands of students who would normally enroll in four-year private or state universities.

VOA: standard.2009.12.14

Britain could be celebrating two class wins on Sunday, with Darlington's Guy Wilks in second, just 45secs behind junior class leader Mirco Baldacci.

BBC: Sebastien Loeb fights for control in the Welsh forests