出处：按学科分类—语言、文字 中国对外翻译出版公司《汉英成语词典》第285页（234字）
常指教育或文章，由浅显到达深处，例教学课程的安排应由浅入深，方能使学生充分地了解。
To help the pupils understand thoroughly what they are learning，the lessons should be lined up from the easy to the difficult and complicated．