gradsn.毕业生；[计] 梯度名词grad的复数形式.gradabbr.毕业生；校友（=graduate)Grading Actuator执行机构graduating valve调节阀,节制阀,阶段制动阀graduating error刻度误差, 校正误差grading citerion评分标准grads-dropping梯度下降法grading function照明函数grading subgroup分品子群gradaute student研究生gradocal filters分级滤器Gradated coating梯度涂层