一: one阶: steps; stairs差分: difference数列: progression; series; a serie ...一阶差分: first difference; first order difference一阶差分法: first difference method; method of first differences一阶差分方程: first order difference equation; first-order difference equation一阶差分算子: first difference operator阶差分: difference of n-th order一阶差别图: first order difference picture二阶差分: second difference; second order difference高阶差分: higher differences三阶差分: third difference; third order difference二阶差分变换: second-order difference transformation离差分数法: deviation score method偏差分数: deviation score阶差: jump成就的离差分数: deviation score of achievement数列: progression; series; a series of numbers arranged according to a certain rule一阶: first order; first-order; single(-)ordert分数: t score; t-score分数: 1.[数学] fraction; fractional number 带分数 mixed number; 繁分数 complex fraction; 假分数 improper fraction; 真分数 proper fraction2.(表示成绩等的数字) mark; grade; point 他在考试中得到好分数。 he attained a good mark in the examination. 他的三角学分数很低。 he received a low mark for trigonometry. 他的学期论文得了个不及格分数。 he received a falling grade on the term paper二阶差别图: second-order difference picture阶差淬火: differential quenching温度阶差: thermal taper