Inthispaper,westudythestructureofthespaceoffunctionsofboundedsecondvariationinthesenseofShiba;在本文中,我们研究了柴犬意义上有界第二变异的功能空间结构。anintegralrepresentationtheoremisalsoprovedandnecessaryconditionsaregivenforthatthespacebeclosedundercompositionoffun