求指导!
Inarecentsurvey,itwasfoundthatonly24.5percentofJapanesestudentswerefullysatisfiedwithschoollife,comparedwith67.2percentofstudentsintheUnitedStates.这里的schoollife后面用逗号,然后又接comparedwith67.2percentofstudentsintheUS是什么用法?这里的comparedwith67.2percentofstudentsintheUS是做什么成分?