-gradeWiktionary 原文英美词源链拉丁语Latin约前 75–公元 3 世纪gradus‘step, degree’↓ 派生英语English-grade词源说明From Latin gradus (“step, degree”) and gradior (“walk”).释义后缀suffix1(zoology) Describes a specified way of walking or locomotion, especially according to the limbs or organs utilized.2Describes a specified direction.3rareDescribes a variation along a scale or gradient.