Andthrowgarbageanywhereyoumightseetwodifferentsituationsoneis:achildinthehandsoftherubbishcarelesslydroppeditonthegroundofhisparentssawwillseverelymadethelittleboyputtherubbishupandthrowitintothegarbagebinandtheotheroneis:achildhandthingsfalltothegroundaftertheadultshaveseenbuttoseewithoutseethisistwokindsofdifferentperformanceoftheformerisworthyofourstudyandthelattershouldbeourcriticism