Whether or not he is able to achieve two or three layers on the 0.3 millimeter thick eggshell depends entirely on the force with which he wields the knife. "Engraving" means to carve out the unwanted parts of the sketched drawing.
如何在只有○・○三釐米的蛋殼刻出二至三個層次感的作品，全憑力道的拿捏。