The minuscule elements, producing a lot less torque than a mechanical watch part, will never power a submarine through the blood vessels on a trip to the islets of Langerhans.

• 这些微小元件的扭力比机械表的零件要小得多，实在不可能推动潜水艇在血管中游走，到胰脏内的兰氏小岛上一游。