supplementary problems
补充问题
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The course website features extensive problem sets and supplementary problems.
课程网页包括广泛的习题与附加习题。
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Problems based on class lectures, as well as supplementary problems, will be posted during the week of the lecture.
在每周的讲课中，会公布关于该周课题的习题和附加习题。
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