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?
凶手逃跑时，出于某种原因，认为步行比起自行车要安全得多。所以他把自行车丢到他安全逃走以后才可能被发现的地方。到此为止，我们只能认为这些推测是可能的，对不对？