n. 等级, 年级, 阶段, 成绩, 程度, 坡度, 斜坡
vt. 分等, 分级, 评分
vi. 属于某等级, 逐渐变化
英文释义
n. a relative position or degree of value in a graded group
n. the gradient of a slope or road or other surface
n. a degree of ablaut
n. the height of the ground on which something stands