名词
中文翻译：分级难度
同义词：
['graded difficulty', 'graded complexity例句：1. The course is designedto challenge students with a graded difficultylevel.（该课程设计为挑战学生，难度逐级递增。）2. The textbook has been graded difficulty for different levels of learners.（这本教科书针对不同水平的学生进行了分级难度设置。）']
例句：
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1. The course is designedto challenge students with a graded difficultylevel.
该课程设计为挑战学生，难度逐级递增。
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2. The textbook has been graded difficulty for different levels of learners.
这本教科书针对不同水平的学生进行了分级难度设置。
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3.The project requires students to work through agraded difficulty in understanding the concepts.
该项目要求学生通过逐级难度的练习来理解概念。