This Robotic Device Is Small Enough to Operate on the Human Eye(翻译)

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surgery – n. medical treatment in which a doctor cuts into someone’s body in order to repair or remove damaged or diseased parts

capsule – n. a part of the eye lens

diameter – n. the distance through the center of something from one side to the other

scale – n. a range of levels of something from lowest to highest; the size or level of something especially in comparison to