英文词源
- gradation (n.)
- 1530s, "a climax;" 1670s, "orderly arrangement or succession," from Middle French gradation (16c.) and directly from Latin gradationem (nominative gradatio) "ascent by steps; a climax," noun of action from gradus "step, degree" (see grade (n.)). Meaning "gradual change" is from 1540s.
中文词源
来自grade, 级别，层级。
该词的英语词源请访问趣词词源英文版：gradation 词源，gradation 含义。
词根词缀： -grad-步,级 + -ation名词词尾
