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262页（217字）
极恳切地劝告，例老师谆谆告诫学生要勤奋认真读书，堂堂正正做人。
The teacher told the students earnestly that they must study hard and conscientiously and also be open and aboveboard in their conduct．