He made his escape, and for some reason thought that he could do so more safely on foot than on the bicycle. He therefore left his machine where it would not be discovered until he had got safely away. So far we are within the bounds of possibility, are we not?
兇手逃跑時，出於某種原因，認為步行比起自行車要安全得多。所以他把自行車丟到他安全逃走以後才可能被發現的地方。到此為止，我們只能認為這些推測是可能的，對不對？