C193 The Sharpening Knife Does Not Cost the Woodcutter

The sharpening knife does not cost the woodcutter

Chen Qun soon had an answer to his question. What limited the progress of medical science and technology had always been the common problem of the human world — the cost. Any advances in science and technology are moving from high costs to low costs. Like a CT or an MRI machine, it was initially too expensive for most hospitals to afford